Race Bike Rebuild
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- Avgas Sniffer
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- Joined: Fri Jun 18, 2010 11:29 am
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Race Bike Rebuild
As some of you were after pictures of the evolution of next year's bike, I'm making a start now with this one and we'll go from here.
As you can see, I've started by fitting a ZXR400L front end and I also managed to pick up a few RGV250 VJ22 rear wheels, to benefit from the wider tyre choice.
Many of the guys run on the Michelin SM pre cut slicks, but I've opted for the Michelin PowerOne race tyres. They come in a choice of compound and also make a road version of this tyre.
I've fitted some Jim Lomas stainless steel expansion chambers, with carbon fibre end cans.
Next jobs are to create an under tray for the rear sub frame and make a flywheel cover. The flywheel has gone away for a week with slimming world, so will hopefully come back a bit lighter. I need to make up a gear linkage, a chain tensioner to clear the chain between the expansion chamber and I will make a start on fitting the body work.
Next installment of photos in about two weeks.
As you can see, I've started by fitting a ZXR400L front end and I also managed to pick up a few RGV250 VJ22 rear wheels, to benefit from the wider tyre choice.
Many of the guys run on the Michelin SM pre cut slicks, but I've opted for the Michelin PowerOne race tyres. They come in a choice of compound and also make a road version of this tyre.
I've fitted some Jim Lomas stainless steel expansion chambers, with carbon fibre end cans.
Next jobs are to create an under tray for the rear sub frame and make a flywheel cover. The flywheel has gone away for a week with slimming world, so will hopefully come back a bit lighter. I need to make up a gear linkage, a chain tensioner to clear the chain between the expansion chamber and I will make a start on fitting the body work.
Next installment of photos in about two weeks.
- Howie
- Avgas Sniffer
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Its looking good Luders,
Are you running the carbs with the trumpets open or are you going to enclose them in a purpose made airbox? I know there was a bit on the forum a little while back where a member had enclosed the trumpets in a larger than standard box but I can't remember who posted the item sorry, memory is rubbish.
Also I was thinking of going two single lines to my front brake set up on my (yawn) ongoing Kr1s project. Is there any benefit in using the set up on a road bike? Or is it just a weight saving idea on a race bike?
Has the bike got the RGV rear on it in the pic, can't tell because of the angle or is it a Kr1 item? Once again due to lightness? And if you use a 17" rear, how do you adjust for ride height etc or is that taken into account with the rear shock? (R6?)
I'm pretty sure I've read the answers to all these questions before but because I will hopefully have the time over winter to work on my Kr1s, its just nice to know which post they are all in & yes these are all mods I want to do on my Kr1s
Its been said before but I'll say it again, nice pipes sir
Are you running the carbs with the trumpets open or are you going to enclose them in a purpose made airbox? I know there was a bit on the forum a little while back where a member had enclosed the trumpets in a larger than standard box but I can't remember who posted the item sorry, memory is rubbish.
Also I was thinking of going two single lines to my front brake set up on my (yawn) ongoing Kr1s project. Is there any benefit in using the set up on a road bike? Or is it just a weight saving idea on a race bike?
Has the bike got the RGV rear on it in the pic, can't tell because of the angle or is it a Kr1 item? Once again due to lightness? And if you use a 17" rear, how do you adjust for ride height etc or is that taken into account with the rear shock? (R6?)
I'm pretty sure I've read the answers to all these questions before but because I will hopefully have the time over winter to work on my Kr1s, its just nice to know which post they are all in & yes these are all mods I want to do on my Kr1s
Its been said before but I'll say it again, nice pipes sir
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- Avgas Sniffer
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- Joined: Fri Jun 18, 2010 11:29 am
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I will be making a custom airbox from carbon fibre, but it's Mark Jordan who has been working on his and posted some photographs on the forum.
Having the brake hoses running straight from the master cylinder instead of through the splitter is more efficient and I would recommend it for road use as well as race.
The rear wheel in the picture is an RGV 17x4.5 inch rim, so you loose about 12mm of ride height, but gain about 70mm by fitting the R6 shock, I forget the exact numbers.
The key thing is the bike geometry and rake angle, so fitting ZXR forks raises the front height to compensate for what you gain in the rear.
I would always have a smaller rake angle than what it's set from factory, somewhere around 26 degrees, so welcome the overall increase in height from the rear.
Having the brake hoses running straight from the master cylinder instead of through the splitter is more efficient and I would recommend it for road use as well as race.
The rear wheel in the picture is an RGV 17x4.5 inch rim, so you loose about 12mm of ride height, but gain about 70mm by fitting the R6 shock, I forget the exact numbers.
The key thing is the bike geometry and rake angle, so fitting ZXR forks raises the front height to compensate for what you gain in the rear.
I would always have a smaller rake angle than what it's set from factory, somewhere around 26 degrees, so welcome the overall increase in height from the rear.
- JanBros
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performance wise, there is no difference. presure is spread equally throughout the system, presure doesn't know if there are 2 lines or one seperating into 2Luders wrote: Having the brake hoses running straight from the master cylinder instead of through the splitter is more efficient and I would recommend it for road use as well as race.
My ultimate goal is to die young as late as possible !
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- Avgas Sniffer
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- Joined: Fri Jun 18, 2010 11:29 am
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So, I've done the gear linkage and made a start with the fairing.
The belly pan was too narrow, so I've had to cut some holes for the spannies to poke throug, otherwise it just wasn't going to go high enough.
I will fibre glass over these later and contour them around the exhausts.
I'm also having to raise the sides which run along the frame slightly, which is why you can see a thin layer of fibre glass fabric there.
The brake reservoir will also need to be lowered a bit to make way for the screen and I can't stand the way the belly pan sweeps back and tries to hide the exhaust, so those will be trimmed right back!
Here's your picture
The belly pan was too narrow, so I've had to cut some holes for the spannies to poke throug, otherwise it just wasn't going to go high enough.
I will fibre glass over these later and contour them around the exhausts.
I'm also having to raise the sides which run along the frame slightly, which is why you can see a thin layer of fibre glass fabric there.
The brake reservoir will also need to be lowered a bit to make way for the screen and I can't stand the way the belly pan sweeps back and tries to hide the exhaust, so those will be trimmed right back!
Here's your picture
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- Avgas Sniffer
- Posts: 3926
- Joined: Fri Jun 18, 2010 11:29 am
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This is just a rebuild of my original and the only things you cannot change, is the engine, frame and swing arm.
Although I race with Derby Phoenix, Thundersport GB outline the regulations well and they are similar.
http://www.thundersportgb.com/downloads ... egulations
Although I race with Derby Phoenix, Thundersport GB outline the regulations well and they are similar.
http://www.thundersportgb.com/downloads ... egulations
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- Avgas Sniffer
- Posts: 3926
- Joined: Fri Jun 18, 2010 11:29 am
- Location: Oxfordshire
Progress has been slow lately and I'm currently still working on getting this fairing right. I'm going to cut the belly pan down diagonally from the top piece, where it meets the fairing upper, to raise the ground clearance of the rear and I'm having some upper fairing brackets fabricated from aluminium.
- 500bernie
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- Avgas Sniffer
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- Joined: Fri Jun 18, 2010 11:29 am
- Location: Oxfordshire
- JanBros
- Avgas Sniffer
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