NS125RK gone bang

Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

Greetings
i was doing 70mph at relatively low RPM earlier and then i heard a rather unhealthy sound. It then began to lose RPM's and the throttle had no response. I quickly got it to the hard shoulder and tried to kick it, one problem, the kick wouldn't budge Mad

i walked it about 4 miles to a service station where i phone my mam and she called a mechanic to come pick the bike and myself up.
from the description i gave him, the mechanic thinks that it may not be worth the money to repair, but we're not sure what has happened to it yet (need to check back with him next week). i'm hoping that its something silly, i love my honda Crying or Very sad

Have any of you people had a similar problems?
if so, was it expensive to repair?
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ZaphodBeeble · World Chat Champion Joined: 10 Feb 2004 Karma :

Sounds like the engine seized up. Either it was on it's way out or you didn't have any 2-stroke oil in it. Confused

Loads of people make the repairs themselves, lilldic_mossy for one has just recently repaired his NS125 which had seized up.

Check this out https://www.bikechatforums.com/viewtopic.php?p=179340#179340

Good luck! Thumbs Up

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Current bike: VTR1000F Firestorm. Previous: Firestorm (written off) - XJ600 Divvy - NSR125 - DT125 and a load of offroaders.

mr jamez · World Chat Champion Joined: 04 Aug 2003 Karma :

Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

nope, didnt get an offer..
all though, he does have a newer Honda NSR125R in his workshop which he doesnt use, if its beyond repair, maybe he will sell the NSR to me Wink

i know that my NS could be sold for spares/repair because everything is in perfect condition, fairings - not a scratch, frame - mint, wheels - perfect..
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Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

oh dear another ns gone bang ! Crying or Very sad

My advice is get a haynes manual first and work out what went wrong before stripping it down and even before thinking of selling it.
I had parts off ian(gpz) from his old ns for £60 and rebuilt the top half of the engine,and thanks to ZaphodBeeble he sorted out my loss of spark problem.
The bike seized up at 70 mph,almost kicking me off the thing .
After 10 min's of looking to find out what went wrong, it started back up okay,and i mangaged to ride the bike slowly back home.
Turned out that the piston seized up due to the fact the small end bearing broke up and stuck in the sides between the piston and the cylinder, also screwing every thing right up ! (see the photos on bike pics ,my sig at the bottom)lucky to ride it home Shocked

My bike is running fine and back on the road after a month of work.( working on it during the nights )

If you aint passed your test yet, try doing the bike up, if its going to be cheap and then get a bigger bike after you do your test. (Like me !)

Any probs pm me or if you aint got a manual for it i can talk you through it with mine Thumbs Up

(keep the bike !)
(Or sell me the fairings Thumbs Up

)

Richard
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Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

lol cheers for the help
i do have the Haynes workshop manual but i only know how to ride bikes, not repair them.
i'm pretty sure its the cylinder.
atleast you were fortunate to ride home, i had to push mine about 4 miles down the A19 to the nearest service station..
i forgot my mobile phone didn't i Embarassed

my derbi senda is advertised for sale but i think i'll have to keep that for a couple of weeks, get the NS sorted, then keep for a while until i've done the test, then sell for a bigger bike.
the bike is at the mechanic now though, cant give it an inspection..
no worries, its in good hands Wink

give him a call next thursday, find out whats wrong, then i'll be ordering some stuff from davidsilverspares.co.uk
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Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

Nice one

Took my ns125r out this morning after sorting out the exhaust and cdi unit, had a nice little blast on it.
About an hour ago i decided to go out again,rolled my bike down a home made ramp down a step as normal,BUT ( Brick Wall

) didnt use the front brake to slow it down. (This was walking the bike not riding it.)
Shocked

And smacked the bugger straight into my brick gate piller !- DOH !
Front left hand side of the fairing is now held together by tape !
Evil or Very Mad

Korn is there a muppet of the week award ? Laughing

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ZaphodBeeble · World Chat Champion Joined: 10 Feb 2004 Karma :

Mossy you bell end! Laughing

Get some new fairings and paint them pink. Wink

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Current bike: VTR1000F Firestorm. Previous: Firestorm (written off) - XJ600 Divvy - NSR125 - DT125 and a load of offroaders.

Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

so peeved off that i done that, i had to take the thing out for a ride just to calm down, minus bits of my fairing !
Its all stuck back together with red electrical tape for now, till i get some more glass fibre stuff !
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Elanzer · Derestricted Danger Joined: 21 Mar 2004 Karma :

why don't get your hand on a new crashed nsr and take the engine and a couple of stuff from it... on my NS125R it's a 1998 NSR125 engine on... and it runs fine Cool

so why not ? its a steel frame so there is no big problem welding the frame so the engine will fit Smile

just got mine running after the winter Cool

https://home.no/elanzer/MVI_0088.avi yes thats the 98 nsr engine, i'm waiting for a new mufler (?) i'm not so good in english Laughing

Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

lmao, duuuuuh
mossy, if my bike is totally screwed, you can have the fairing Razz

its absolutely spotless.
i'll be devistated if its expensive to repair Crying or Very sad

i love it too much lol
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Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

Diehard · Trackday Trickster Joined: 18 Jan 2004 Karma :

I have an NSR125RK, and after my barrel sized (overheated) I had to replace the barrel, piston, rings, and oh-shit clips. The usual really, oh yeah, and gasgets. I knew nothing about an engine before then, but you get through, I didn't even have a manual. Just though that might make you feel better about doing the work. Oh by the way I have a spare barrel and head, only done 2500miles, if your interested. When I repaired mine, it cost around £300 in all (Honda swizz you something rotten). I would offer you the piston and rings to match, but I snapped the piston in half trying to unscrew a nut off the crank shaft! Rolling Eyes

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Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

ouch, i'm sure with some time and effort i could do the work myself.
i'll keep that offer in mind, thanks Smile

i was just checking out david silver's website.
barrel and piston - £99
base and head gasket - £12.50
piston rings - £22
the mechanics labour - somewhere around £100 to £150 depending on extent of damage.
it's going to cost a good £250 to get back to working order.
i'm doubting that it'll be worth it because i only paid £650 for the bike about a month ago Sad

how much did you pay for your bike, mossy?
Diehard, i noticed that you live very close, where about exactly?
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Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

Paid £250 for mine,with no mot or tax.
Spent a month fixing it up ,eg fork seals,front tire,rusty frame,exhaust,electrics, ripped seat,dodgy fairings etc..
In all i must have spent another £100-£150 fixing it up ,thats not including the extra £100 when the piston seized.

At the time i was looking at a very nice mito for sale at £1800, but my brother talked me around and said to get a "Cheapy to learn on".
Glad he did, after me ramming it into the wall ! Wink

Ps. Tire is fixed ! and i've sprayed it gloss black Eh?

(not the tire, but the wheel muppet ! ,gotta do the front soon !
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Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

good man, i'd hate being without a bike!

but £250, damn thats cheap!
mines got 12 months tax and mot at the moment, so thats one of the reasons why he sold it at £650.

I'm pretty sure i know why it gone bang.
It turns out that he replaced the piston rings a few days before i bought it and they hadn't been ran in (you know where this is going) and me being the idiot that i am, didn't know this..
so while i've been thrashing the guts out of it, the cylinder has slowly began to eat itself Razz

I'm definitely getting it repaired, no matter how much it costs
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Elanzer · Derestricted Danger Joined: 21 Mar 2004 Karma :

i got mine for 550GBP (think thats the curance in england Rolling Eyes

) and it wass really cheap

Laura · Playboy Bunny Joined: 28 Jul 2003 Karma :

Diehard · Trackday Trickster Joined: 18 Jan 2004 Karma :

Man I hate my local dealers, have ya eyes out, and their never open. Anyway I think the worst part about when I did it was when I had to spend 500+ miles running it in. I got overtaken by a scooter! Evil or Very Mad

But at least you know you are gonna make it last. As for where I live, it's a secret... Actually it's near Darlington, Co Durham Very Happy

.
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Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

aah you live real close, i'm in Middlesbrough.
I know, i wont be looking forward to the running in process either. You never know, i might get off lightly and just need to replace the rings Razz

I'll just ride to college the long way (the way i've been going on my Derbi 50) for a couple of weeks once its repaired. That way i'll clock the miles up no problem and without putting stress on the engine. Only 30mph roads all the way there.
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Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

Just come back from Abergaveny/brecon just now.
The place where the engine seized up before Confused

,didnt this time Very Happy

As for running it in,i got bored after the first 100 miles, and now i'm not going much over 6/7 thousand rev's Rolling Eyes

Still playing up in 5th gear though Crying or Very sad

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Diehard · Trackday Trickster Joined: 18 Jan 2004 Karma :

Bout time someone lived near me! A lad around the corner from me has a Derby 50, and it's forever broken, I asked if he wanted me to put another engine in it, since I know this great web site that has people selling parts cheaper than breakers would Very Happy

. He's thinking about it. If you get stuck with the engine, give me a shout, I've had mine apart too many times to mention now, so I might be able to help.
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Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

will do bro, cheers Thumbs Up

its irritating because none of my mates have or like bikes. there is one but he only has motocrossers. otherwise its just me and my dad, which may sound a bit sad but atleast i get to ride his yam fzr!
but my derbi has been a sound bike, even after putting a metrakit exhaust on without adjusting anything (it even makes better use of the carb now and no longer cuts out when idle)
how old are you diehard?

whats up with 5th, mossy? Confused

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Diehard · Trackday Trickster Joined: 18 Jan 2004 Karma :

Well I'm 20, but going on 45 fast with all of the hair I'm pulling out over my bikes! Neutral

See, I've even put a bald face on to prove it!
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Valentino Mossy · World Chat Champion Joined: 13 Jul 2003 Karma :

I think because i'm not rev'ing it high enough,its very sluggish.
Hopefully in another few 100 miles of "running it in",I'll give it some more oomph ! Thumbs Up

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