Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


125cc Supermoto - 2 Stroke goodness

Reply to topic
Bike Chat Forums Index -> General Bike Pictures Goto page Previous  1, 2, 3 ... 12, 13, 14
View previous topic : View next topic  
Author Message

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 15:42 - 13 Aug 2017    Post subject: Reply with quote

https://youtu.be/nkq7gTJZh7g
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :

PostPosted: 17:36 - 13 Aug 2017    Post subject: Reply with quote

Hiya

Ouch on the radiator.

RS varies. Over a few thousand miles of general use mine (34mm carb) average 55mpg. Normal use about 50 but raised up a bit from running in (and the fuel strikes - ridden like very sedately it managed 74.5mpg Razz )

All the best

Katy
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

stevo as b4
World Chat Champion



Joined: 17 Jul 2003
Karma :

PostPosted: 21:55 - 13 Aug 2017    Post subject: Reply with quote

She is sounding pretty good considering its not fully set up and it's only done 70miles or so. I reckon it'll sound a bit different after the dyno set up though as my crap two stroke ear, says it's not quite there jetting wise yet?

Pain on the sexy Rad leak though mate. Being alloy, I reckon for someone with the right gear, it'll be a 30second job hopefully for a drink token.

My 200 rad is at the most local alloy radiator specialist, and I've give them the go ahead to do an uprated thicker alloy replica. The quote made me almost spit my tea all over the floor, as it was about double what I'd expected.

Can't really put a price on keeping a tuned hotter running engine safe though, that's what I've told myself anyway. Laughing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 10:32 - 14 Aug 2017    Post subject: Reply with quote

Another little clip


https://youtu.be/BDzvqFOUkno
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 21:56 - 14 Aug 2017    Post subject: Reply with quote

Okay.
It's booked in for a dyno on Friday.

If I was to fit a power valve after it's been set up. Will it need re jetting again?

Probably a question for Kickstart there. 😎
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

stevo as b4
World Chat Champion



Joined: 17 Jul 2003
Karma :

PostPosted: 22:46 - 14 Aug 2017    Post subject: Reply with quote

Cool news!

I'm sure kickstart will know the answer to that, but when your at the dyno can you ask them to do a run with the power valve closed logging the fueling ratio, and then again for a run with the valve fixed open.

It would show you two things apart from the fueling changes needed. First it would show you how much midrange torque you gain with the power valve shut, and secondly where the two graphs cross it would show you the ideal rpm or close to it where you should want the power valve to open.

On my baseline run, I noticed that the fuel trace mirrors the dip in torque where my KIPS valve opens, and it momentarily goes lean, my guess is because there's suddenly much more air flow ability through the cylinder? I reckon that if your jetting is close that valve open or closed it won't change much apart from the transition between the two states.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :

PostPosted: 20:44 - 15 Aug 2017    Post subject: Reply with quote

Hi

As standard Aprilia didn't change the jetting on the older bikes when they restricted them. But that was comparing a moving power valve with the low power position blanking plate.

I would probably see how it goes when you fit the power valve.

All the best

Katy
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 10:04 - 18 Aug 2017    Post subject: Reply with quote

Well, wont be dynoing it today.
Fucking rad has completely shat it's self.


So I've got a new one on order, should be here tomorrow.
And some new hoses as the old ones were a bit short and tightly pulled around the frame.

My pal has just bought a road legal Stomp pit bike with a CRF250 motor stuffed up it.
Cant wait to get out and have a blast with it. Wonder which bike will have the edge. 2t-125 or 4t-250.
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :

PostPosted: 08:58 - 19 Aug 2017    Post subject: Reply with quote

Hi

If you are replacing the rad anyway, as a short term bodge some epoxy putty would probably work.

All the best

Katy
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 19:01 - 22 Aug 2017    Post subject: Reply with quote

New rad fitted and filled up with water.

Quick road test yesterday, but the temp gauge has stopped working now. Laughing
This fucking bike.
Think it's just a flat battery. It's only a cheap gauge from OORacing.



One thing I noticed with the new rad. The water flows from bottom to top.
The old rad, it flowed from top to bottom.

Is that an issue?


http://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/20992940_526670074350689_6610207483855095394_n.jpg?oh=70401454c4040aa20e08d36670ecc3dd&oe=5A1EF5B4


I'm watching a few RotaxMax powervalve units on ebay. Missed the last 2 that were for sale.
Hopefully I'll get one and fit it before I get it back in for a Dyno.


My pals bike with the CRF250 lump in it.
It's built into a Stomp KZR frame. What I'd like to frame mine into eventually.

http://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/20881850_10212147820084116_7841892453880351097_n.jpg?oh=1d841a9a4da95e462ecbb71517ac4d1f&oe=5A1C7959
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

Pete.
Super Spammer



Joined: 22 Aug 2006
Karma :

PostPosted: 19:09 - 22 Aug 2017    Post subject: Reply with quote

binge wrote:


One thing I noticed with the new rad. The water flows from bottom to top.

The old rad, it flowed from top to bottom.

Is that an issue?



Very much an issue. Radiators work on the thermosyphon principle. Hot water enters the top and cools, gaining density which makes it fall lower in the radiator, drawing more hot water in the top and exiting colder water out the bottom.

Early cars had no water pump, they relied on this principle for the water flow.

Having said that, this article says that modern engines might be forced by the pump to run contrary to the natural thermosyphon so you might well be ok.

https://en.wikipedia.org/wiki/Thermosiphon#Engine_cooling
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

Kickstart
The Oracle



Joined: 04 Feb 2002
Karma :

PostPosted: 19:23 - 22 Aug 2017    Post subject: Reply with quote

Hi

As Pete says, but how is it plumbed in to take coolant from the top of the engine and feed it to the bottom of the radiator? From the pics it looks like it would be possible to run the pipes to the other connections on the rad.

The Rotax water pump is not particularly powerful (impeller rather than pump). Doesn't need to be normally, but if pushing against natural water flow it might well struggle.

All the best

Katy
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

stevo as b4
World Chat Champion



Joined: 17 Jul 2003
Karma :

PostPosted: 20:00 - 22 Aug 2017    Post subject: Reply with quote

Dude, I hope you can find an easy way to re route the pipes the other way, as I'd hate for you to cook a nice fresh Rotax if the current set up is an issue. If it's not cooling well enough this way, the dyno will kill it quickly, as bikes get hot quickly on the dyno anyway.

Oh and tell your mate that his bike has far too much engine forced to fit into far too little bike for anyone with an ounce of sanity! Laughing

Seriously though, a pit bike with a 14000rpm 40bhp 250 race engine must be one mean son of a bitch to try and use fully!
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 10:13 - 23 Aug 2017    Post subject: Reply with quote

Yup. Top of engine to bottom left (near side) of rad.
It used to go to top left of rad but the new rad has a different lay out.

The right side (off side) of the rad has 2 ports. 1 top and 1 bottom.

Only other option is to see if I can cut a port off of the old rad and get it brazed onto the top left of the new rad. Giving it 4 ports. And just blanking off the spare 2.
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 20:01 - 24 Aug 2017    Post subject: Reply with quote

And the 12's are on.

http://scontent-lht6-1.xx.fbcdn.net/v/t31.0-8/21013752_527939657557064_4098178256951719593_o.jpg?oh=882b5b9814d97a8dfa6f090fa39dd5ee&oe=5A31CBF4



Have another set of rims to fit some PMT Slicks to, for the track.
The PMT BlackFires that are currently fitted are road legal. Smile
Super stick tyres too. Start riding it properly now.
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 14:16 - 27 Aug 2017    Post subject: Reply with quote

Well I should have put the thing on 12's from the start.
A totally different bike. Rides like a supermoto pit bike now. Can bank it over like my race bike without any fear of losing grip.

Went for a little rip with my pal on his 250 the other day.
Got my arse royally handed to me. No comparison what so ever!

I was hammering the life out of the Rotax, and the CRF250 pit bike was just lifting the front wheel and taking off, every time. Laughing

The thing is an absolute demon! Twisted Evil

http://scontent-lht6-1.xx.fbcdn.net/v/t31.0-8/21055846_528429804174716_5965641853653993877_o.jpg?oh=6225808617fbe164f3cf8393e514b5e5&oe=5A5B27FB
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

stevo as b4
World Chat Champion



Joined: 17 Jul 2003
Karma :

PostPosted: 16:01 - 28 Aug 2017    Post subject: Reply with quote

That thing instantly looks as fucking hard as nails, with the 12's on instead! Can't believe the difference tbh!

And I'm a fan of cast alloy wheels, and liked the look alot before. Has the gearing changed much with the new wheels?

Oh and your mate is a total deranged loonie +100 Laughing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 18:56 - 12 Sep 2017    Post subject: Reply with quote

http://scontent-lht6-1.xx.fbcdn.net/v/t31.0-8/21318984_533595743658122_2339664316720284000_o.jpg?oh=8a8178cc88b55954d38c0fcdcbda85e5&oe=5A1B078C
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

binge
Emo Kiddy



Joined: 03 Jul 2004
Karma :

PostPosted: 08:47 - 13 Sep 2017    Post subject: Reply with quote

Cracking day on track at Rowrah.
The 2-stroke had the pace to stay with most of the CRF150s qnd the KTM105, but It was the set up and myself holding it back.

Gonna spend a bit more time working with the suspension and geometry, and have another crack at Whilton Mill in October.

Footpegs are off, I'm making up some plates to move them a good 2 to 3 inches higher up, as cornering clearance was a real issue.

http://scontent-lhr3-1.xx.fbcdn.net/v/t31.0-8/21752761_536134063404290_5106462130831485801_o.jpg?oh=2f93a3fdddeb6c1e325ca9adb4f28879&oe=5A17C91F


http://scontent-lhr3-1.xx.fbcdn.net/v/t31.0-8/21728817_536133760070987_3036132355054115531_o.jpg?oh=a4778cad6cbf05ab95e2b343e52d058e&oe=5A602C5A
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

stevo as b4
World Chat Champion



Joined: 17 Jul 2003
Karma :

PostPosted: 18:24 - 14 Sep 2017    Post subject: Reply with quote

Fucking love it!

You've gotta make that pic your screen saver too! Thumbs Up
Seeing the Rotax pit chasing down a CRF150 race bike is just epic tbh!

I knew it would have pace, I guess it's making as usable a possible and making it handle how you want it to is the key.

Need a sound clip of this thing on a track though x100! Smile
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
Display posts from previous:   

Post new topic   Reply to topic    Bike Chat Forums Index -> General Bike Pictures All times are GMT + 1 Hour
Goto page Previous  1, 2, 3 ... 12, 13, 14
Page 14 of 14

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 

Debug Mode: ON - Server: discovery (www) - Page Generation Time: 1.47 Sec - Server Load: 1.51 - MySQL Queries: 17 - CDN Objects: 38 - Page Size: 132.4 Kb