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| TheWrightGuy |
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TheWrightGuy
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| webhead |
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webhead
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| Beehive Bedlam |
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Beehive Bedlam
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| Ariel Badger |
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Ariel Badger
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| Ste |
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Ste
Not Work Safe
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 Posted: 18:37 - 08 Apr 2015  Post subject: |
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Lose weight.  |
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| Acemastr |
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Acemastr
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| salem1987 |
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salem1987
Scooby Slapper
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Posted: 19:29 - 08 Apr 2015  Post subject: |
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dont modify the cam - simply because its a 2 stroke not a 4 stroke  |
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| Ariel Badger |
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Ariel Badger
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| Posted: 19:39 - 08 Apr 2015 Post subject: |
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Bikers make great organ donors, get 115 on your licence today. |
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| stirlinggaz |
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stirlinggaz
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Posted: 03:10 - 10 Apr 2015  Post subject: |
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| Ariel Badger wrote: | Pointless putting a larger carb on it if you do not port the head to suit |
hi,
so why does my nsr run better & a bit faster with a bigger carb, at the expense of slightly worse mpg? (genuine question btw)
the nsr comes with a 28mm carb as standard, though other bikes with same engine come with 32,34 or 36mm carb.(iirc)
i know the cr has a slightly different ports to the nsr, but its still the same engine.
it would probably be a waste of time & money going as far as a 36mm carb, (im considering fitting a spare VHSB34mm but would prefer to get the cylinder ported 1st to get the most out of it) but seeing as i had a spare VHSA32mm, i thought "why not" its an easier carb to set up & did come off another 125cc 2 stroke.
& im glad i did. i have more useable power at lower revs & i no longer have to rev the tits off it to get anywhere & the power band is wider. (its actually more like having 2 powerbands,tbh)
imho, the PHBH28mm carb can be a pig to set up whereas the VHSA/B carbs are a doddle to get set up right, they have been around for years (i remember a neighbour having one in his mental "tuned" lambretta about 25yrs ago) & is still recognised as an upgrade now & there are more internal parts available, to help getting it set up right.
its like the aprilia rs 125, it has the exact same 28mm carb as the nsr but originally the rs 125 had a 34mm carb therefore the 28mm is viewed as a restriction by most.
the reason so many rs owner fit the bigger carb? to complete the "de-restriction" process.
i suspect the PHBH 28mm carb is fitted either to get through the emissions test (which killed these bikes off) or because they are cheaper than the dellorto VHSB34mnm, or both.
the iridium plug, i have always said avoid on 2t's but followed Alains advice & fitted one & have had no problems or any noticeable gains, tbh.
the jolly-moto exhaust? massive difference, increased bhp fom an exhaust that weighs 10% of the original.
the carbon reeds? slightly better throttle response.
the air filter? untouched, though some nsr owners drill holes in the airbox or cut a sqare hole & cover with wire mesh & report "improvements"..... im not yet convinced.
its just a pity the nsr comes fitted with budget suspension & brakes.
i wouldnt know if braided hoses would improve them any, the originals are still fitted to mine & i find the brakes more than capable of stopping when i want. (when fitted with decent pads)
so i say to the op, the arrow exhaust is a great place to start "modifying" your nsr, but dont go mental with the mods, stick to those that have been tried before & actually "improve" the bike in some way.
but remember to keep all the original parts. when you come to sell it (you will, at some point, trust me) most prospective buyers will want the bike to be as standard as possible (apart from a "performance/race"exhaust) so avoid the anodised tat, neons & silly stickers/paint schemes.
just out of curiosity, have you fitted the arrow exhaust yet? im curious as to what it weighs seeing as the original honda 1 piece exhaust weighs almost 15kg  ( its either 12 or 15kg i cant remember which) whereas the jolly-moto weighs 1.5kg 
enjoy your nsr & ignore the naysayers, there just too old to remember how much fun it is trying to squeeze out every bit of power out of your 1st 2 stroke 
cheers,
GAZ |
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| Teflon-Mike |
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Teflon-Mike
tl;dr
Joined: 01 Jun 2010
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| Posted: 04:48 - 10 Apr 2015 Post subject: |
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Hmmm.. so you don't have the cash to get a A2 licence, but you DO have the cash to try making a slow bike marginally less slow, and a lot less desirable and a lot less reliable, AND buy another bike so you can live with that?
Something in this lot doesn't add up.
125's, are cheap wheels and training tools, they are NOT 'fast' bikes. Even the fastest of the illegal on L's fast 125's are NOT fast bikes, and the NSR was never one of them!
At best; you MIGHT just about manage to make an NSR almost as quick as a standard 'full-power' Aprillia or Cagiva.... which like I say are still NOT fast bikes... look at the buyers guides, they are about as quick as a 1980 Honda CB250... and the performance they don't have isn't even 'cheap' costing more to insure than a 500 commuter twin, returning worse mpg than a 600 super-sport, and demanding the sort of care and attension fickle exotics demand... ad that's the BEST case.
Worst case is you totally fuck it up, and it languishes in parts for the next ten years while you talk about all the fantastic 'mods' you have planed in your 'race rebuild', until yu realise its beyond redempton or your dad gves it to the scrap-man behind your back or something.
Most LIKELY case is you'll mod it; badly. You'll think it goes like stink.. B-U-T.. it has a little 'problem', t just needs the carb setting up, or a different reed, or a different carb, or the ignition's not right... or its just using FAR too much petrol.... and you'll ride round these niggles NOT getting even the performance you have now, most of the time.. until it dies.. then see worst case.
Then.. in ten or fifteen years you'll be looking at adverts for pristine 'restored' absolutely bog-standard NSR125 'Nostalgia' toys, and tryig to kid yourself that if THAT is how much a standard one is worth, the pile of scrap that might still be in your Mum's back garden MUST be worth at least, double that...
Anyway.. BACK to the wisdom and advice you do not like....
1/ before looking for more than standard, make sure you have all you should AS standard.
2/ Want a faster bike? Fit a better rider!
Your on CBT making excuses for why you dont have and cant get a full licence, pleading poverty on the one hand and talking about spending big money on the other. A 'good' rider would know what they got and know how to make the most of it....
3/ With what you got, best way to make the most of it, is to appreciate it for what it is, not bemoan what it isn't and try and make t something it can never be..... fettle it as best you can to the BEST condition of STANDARD as you can; use it to get a licence, even if that is merely the A1 licence self booked for just £120 odd quid, as a stepping stone to a higher group, whilst making you a 'better' rider, having proven your competence to be the minimum expected of a new rider, THEN use the damn thing as intended as moderately cheap, and moderately more sporty than most 125's to get miles and experience under your belt, in that bid to be 'a better rider'.
When your done with it; park it up, scrub it up, and 'standard' in ten or fifteen years YOURS could be the 'mint' original condition example commanding admiring glances at meets or premium price on e-bay as a 'nostalgia toy', not a heap of its representing lots of miles never ridden and dreams unfullfilled.
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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| stirlinggaz |
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stirlinggaz
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Joined: 22 Jul 2007
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| stirlinggaz |
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stirlinggaz
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| Posted: 10:07 - 10 Apr 2015 Post subject: |
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| Teflon-Mike wrote: | Hmmm.. so you don't have the cash to get a A2 licence, but you DO have the cash to try making a slow bike marginally less slow, and a lot less desirable and a lot less reliable, AND buy another bike so you can live with that?
Something in this lot doesn't add up.
125's, are cheap wheels and training tools, they are NOT 'fast' bikes. Even the fastest of the illegal on L's fast 125's are NOT fast bikes, and the NSR was never one of them!
At best; you MIGHT just about manage to make an NSR almost as quick as a standard 'full-power' Aprillia or Cagiva.... which like I say are still NOT fast bikes... look at the buyers guides, they are about as quick as a 1980 Honda CB250... and the performance they don't have isn't even 'cheap' costing more to insure than a 500 commuter twin, returning worse mpg than a 600 super-sport, and demanding the sort of care and attension fickle exotics demand... ad that's the BEST case.
Worst case is you totally fuck it up, and it languishes in parts for the next ten years while you talk about all the fantastic 'mods' you have planed in your 'race rebuild', until yu realise its beyond redempton or your dad gves it to the scrap-man behind your back or something.
Most LIKELY case is you'll mod it; badly. You'll think it goes like stink.. B-U-T.. it has a little 'problem', t just needs the carb setting up, or a different reed, or a different carb, or the ignition's not right... or its just using FAR too much petrol.... and you'll ride round these niggles NOT getting even the performance you have now, most of the time.. until it dies.. then see worst case.
Then.. in ten or fifteen years you'll be looking at adverts for pristine 'restored' absolutely bog-standard NSR125 'Nostalgia' toys, and tryig to kid yourself that if THAT is how much a standard one is worth, the pile of scrap that might still be in your Mum's back garden MUST be worth at least, double that...
Anyway.. BACK to the wisdom and advice you do not like....
1/ before looking for more than standard, make sure you have all you should AS standard.
2/ Want a faster bike? Fit a better rider!
Your on CBT making excuses for why you dont have and cant get a full licence, pleading poverty on the one hand and talking about spending big money on the other. A 'good' rider would know what they got and know how to make the most of it....
3/ With what you got, best way to make the most of it, is to appreciate it for what it is, not bemoan what it isn't and try and make t something it can never be..... fettle it as best you can to the BEST condition of STANDARD as you can; use it to get a licence, even if that is merely the A1 licence self booked for just £120 odd quid, as a stepping stone to a higher group, whilst making you a 'better' rider, having proven your competence to be the minimum expected of a new rider, THEN use the damn thing as intended as moderately cheap, and moderately more sporty than most 125's to get miles and experience under your belt, in that bid to be 'a better rider'.
When your done with it; park it up, scrub it up, and 'standard' in ten or fifteen years YOURS could be the 'mint' original condition example commanding admiring glances at meets or premium price on e-bay as a 'nostalgia toy', not a heap of its representing lots of miles never ridden and dreams unfullfilled. |
hi,
i hope NONE of that was aimed at me & i think you are missing the point.
these 125cc bikes have around 25-28bhp in STANDARD form & they are RESTRICTED down to around 12bhp for UK learner laws.
rerturning them to their ORIGINAL un-restricted form does them absolutely no harm & doing so doesnt make them any less reliable, so stop touting such rubbish.
none of MY bikes are"illegal" & will view any such accusations as libelous.
ok, so now thats out of the way, lets look at this "wisdom & advice" 
the nsr can made to go faster than any standard road legal 4 stroke 125. fact. i also have had umpteen "faster" 125 2 strokes & still own a couple of mitos etc.
nobodys trying to make a NSR as fast as an aprilia rs or cagiva mito & not all 125's are "cheap learner tools" look at the prices they go for, more than, say a 600/750cc bikes of the same age.
some of them may be viewed as learner tools in the UK, but these bikes were never originally intended for UK & any half decent rs,mito, nsr etc with some MOT will sell for over £1000 all day long.
thats not cheap, considering they can be over 15yrs old & have had a few owners, who will likely have abused them. thats their choice, its part of the learning process for many young bikers, imho.
& no amount of comparing an italian 2 stroke bike with a budget aging 4 stroke will make a cb250 any more attractive to me & plenty of other people.
ok, so MAYBE the majority of 125 riders are on a CBT & if riding a full power 2 stroke will be doing so illegally. im not one of them & would never condone ANY illegal activity...but both you & i know the current legislation is unfair to new &/or young riders & if they are CAPABLE of riding a 28bhp bike that will do law breaking speeds, well why not?
it just isnt fair that many riders learned to ride on 250cc bikes while these guys are stuck with a (lethal imo) 31mph scooter at 16 or 14.8bhp 125cc at 17?
nobodys saying "modifying" a 125cc 2 stroke is "cheap".
its up to the op what he does with HIS bike & while i appreciate & agree with the "standard is best" argument, standard to me means returning a bike to its ORIGINAL UN-RESTRICTED form & "modifying" to me, means fitting a decent race exhaust or maybe fitting a bigger carb NOT adding stuff on, just for the hell of it.
the NSR could have been a GREAT bike instead of a GOOD bike by having decent brakes & suspension from new, however all bikes are built to a budget, even the aprilia rs125 which also has budget suspension.
& if anyone can afford to upgrade any of these things, good luck to them, they will have a GREAT wee bike.
the rest of your post doesnt apply to me & i have read such stuff may times from you, this doesnt make it gospel or even right,
cheers,
GAZ |
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| Teflon-Mike |
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Teflon-Mike
tl;dr
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| stirlinggaz |
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stirlinggaz
World Chat Champion
Joined: 22 Jul 2007
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Posted: 21:42 - 10 Apr 2015  Post subject: |
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[quote="Teflon-Mike"]It wasn't.. why would it have been?/quote]
my apologies TEF, dunno what i was thinking when i wrote that....maybe i should start wearing ma specs when looking at small mobile phone screens
again, sorry!
to the op : ignore my bitchyness (is that an actual word?) & just read the stuff that matters.
do you really want to spend 400 quid for a rear shock?
let me know if you do. im curious as to whether its worth doing.
fitting a good rear shock & your half way there, to a VERY GOOD bike imo.
i had a chance recently to get a oem adjustable shock off a sp version & even though it was knackered, i regret not buying it.
i could have upgraded the rear suspension to a very good level for a lot less than the price of a hagon, even with the costs of re-furbishing the unit 
cheers,
GAZ |
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| webhead |
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webhead
Renault 5 Driver
Joined: 22 Mar 2008
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| Posted: 22:31 - 10 Apr 2015 Post subject: |
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if you want to tune an nsr so its , do this ,by athena 180cc kit ,34mm carb with correct jets ,make sure you have the right cdi box and powervalve servo ,and make sure oil pump is set to put more oil in or your seize it up ,and dont forget to buy an arrow exhaust there you go slap that on your shit your pants .
if your going cheapo route ,exhaust , cdi , 32mm carb with correct jets and needle and foam filter big one not a crap one, make sure oil pump is moved up a tad ,fully synthetic oil super plus unleaded.
and dont forget manifold for big carb as standard one wont work.
your get over a ton easy and do it right it will last , do it wrong and your go pop maybe skid a little before you fly off onto tarmac lol |
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| stirlinggaz |
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stirlinggaz
World Chat Champion
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| Posted: 15:25 - 12 Apr 2015 Post subject: |
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| webhead wrote: | if you want to tune an nsr so its , do this ,by athena 180cc kit ,34mm carb with correct jets ,make sure you have the right cdi box and powervalve servo ,and make sure oil pump is set to put more oil in or your seize it up ,and dont forget to buy an arrow exhaust there you go slap that on your shit your pants .
if your going cheapo route ,exhaust , cdi , 32mm carb with correct jets and needle and foam filter big one not a crap one, make sure oil pump is moved up a tad ,fully synthetic oil super plus unleaded.
and dont forget manifold for big carb as standard one wont work.
your get over a ton easy and do it right it will last , do it wrong and your go pop maybe skid a little before you fly off onto tarmac lol |
hi,
the general consensus is bbk's are a wate of time, (& money) with the nsr 125, especially those with no provision for the power-valve (rc), which, iirc the athena is one.(please correct me if im wrong though,because my memory isnt great at my age, & i quite fancy trying a bbk with rc  )
so any cylinder that doesnt use the rc, is gonna have a very narrow power-band, which isnt any use on road going bikes, imho.
so why suggest such kit as "right cdi box" & "power valve servo"?
general consensus is, the original gilardoni cylinder, with tv78 rc controller & ci626 cdi combined with a "decent" exhaust is generally the best way to go.
an oem cylinder that has been "tuned" by a respectable tuner would be the next "best"( & more expensive) way to go
buying a decent exhaust & bigger carb, is no "cheapo option" believe me.
the jolly moto exhaust costs around 350 quid new (good luck finding a 2nd hand one), the arrow system you suggest is actually the cheaper option. opinions vary which is "best" ( i have no experience of using an arrow on the nsr but my previous encounters with them have been less than favourable), & the 32 or 34mm carbs around £140. (not including manifold or correct jetting), though they can be had 2nd hand for a lot less. (but this can be a bit of a lottery with many being around 20rs old)
these mods will get the nsr over 100mph (just lol) with plenty of information available from those who have tried such mods, with very few examples of seizures or other problems, unlike the bbk's, which seem to have some "issues" according to the information available from those who have tried it,
cheers,
GAZ |
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