My Bike

James · Guest

Just thought id share with you my bike, seen as theres no others like it, anywhere. I built my bike from a box of rusty fucked up parts and sprayed it blue and white, i think it looks pretty good myself. I also fitted a replica small top fairing and tuned the bollocks off the engine. For a bike thats 13 years old it looks amazing and now its been ported and polished and ive advanced the ignition timing it flies. The main mods are;
K&N filter, 20% jetted up, 2 sizes larger on pilot jet, Ported & Polished, cylinder head skimmed, heavier fly-wheel, smaller but shorter stinger tail pipe, drilled silencer to fully de-restrict, ATAC port blanked, All new bearings and one or too others.
The bike is fast as fuck yet a bit of blow by is occuring on the exhaust side of the piston. I think it'll need a new piston soon.
To see pics of the bike finished copy and paste this link:
<A HREF="https://www.geocities.com/big_jimbo2k/NSPics.htm">https://www.geocities.com/big_jimbo2k/NSPics.htm</A>
To see one or two pics of the bike when i bought it and a couple of the engine being built, copy and paste this link:
<A HREF="https://www.geocities.com/big_jimbo2k/bikepics.htm">https://www.geocities.com/big_jimbo2k/bikepics.htm</A>
Have a look and tell me what you think.
Cheers

mark · Guest

The tail unit needs spraying blue to match the rest. What about fitting wheels from a later NSR?

Keith · Guest

Hi
The bike looks good, and I think the blue tank and white seat unit suit it well.
How did you blank off the ATAC? Years ago on my MBX I toyed with doing this, but on that it would be more difficult (the ATAC position on the barrel was welded over). Also worried me a bit that it might have problems with the preasure all the time if we tried using the attachment for the cap on the ATAC chamber. The cap managed to blow off a few times, and on a couple of occasions I landed up riding home very slowly with a gloved hand over the missing cap position, just to try and keep the noise down.
How much did you change the ignition by?
All the best
Keith

James · Guest

Cheers Keith. I advanced the ignition by re-drilling and slightly moving forward the pick-up coil. By doing this the magnetic pick-up on the fly-wheel goes past slightly later. Didn't make much difference just seems to rev higher.
About the ATAC chamber. I made a thin piece of steel round the exact size of the chamber opening in exhuast port. I then cut some round copper radiator piping so that the plug was pushing against the piping and the piping pushing against the piece of steel covering the ATAC port. Now the bike has little power below 6k (probably still more than an NSR becuase of cylinder head skimmed plus K&N and re-jet) but as soon as revs get over 6.5k it screams all way round the rev counter which will be about 11.6k-12k revs.
Ive just got my hands on the rear single seat conversion which looks nice but will need filling and spraying as its badly cracked and bright red.
By the way, is the blow by on exhaust side of piston caused by the constantly returning powerwaves which occur because of the blocked over ATAC?

Keith · Guest

Hi
I would not worry about a slight amount of blow by. Wear in the barrel and piston will make it worse though
All the best
Keith

James · Guest

Anybody else got any idea's/opinions about what to do next to it. Im running out of ideas. Any comments appreciated.
Cheers

Keith · Guest

Hi
The exhaust port area will get very hot, probably even more so with the ATAC blocked off. This will probably increase wear in this area.
Also, so build up of carbon will be visable on the piston in this area just as it is exposed to the exhaust gases as it passes over the port
All the best
Keith

James · Guest

Korn will you do me a favour mate, put the pics of my bike on the visitors bikes section. Preferably a before and after shot as well. Ignore the inverted colour pic that just looks naff.
Cheers anyway

kewbie · Guest

hi
all i can say is that was fuking amazing!! absolutly crazy, i think if id seen that bike in the shed after enquiring about buying a 125, I'd laugh at the silly muppet trying to sell me the 150kg+ pile of scrap. But u have done some brill work and made a 125 probly faster than most (for at least as long as it lasts) although I was glad to see what looked like an axe handle in one of the pics just to show how to take out the technical fustration on a machine.
l8r
kewie

James · Guest

Cheers Kewbie, appreciate that. It is an axe you can see in a pic and was used for the technical job of throwing at the shed wall every now and again.
Works wonders

James · Guest

By the way ill be posting loads more pics on my site of the bike halfway through the rebuild soon. Those couple of pics ive posted miss out the really fun parts like trying to split the crank-cases, getting the old bearings off crank-shaft, alligning the balnce shaft wrong then having tostrip the bastard again to get to it. Oh the hours of fun.
Problem is ive managed to delete a few Windows startup files and cant get into computer for minute.
Ill let you know when its sorted anyway