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ok..so you're bored and you need somethin to read with pictures...so here they are.. 
again...i made few additions to the good old r1 engine... since the bike has become track only, the nitrous had to go and I needed somethin to compensate...
the objective was to make the r1 as peaky as possible, I know this is most undesirable form of power delivery for most riders but that's how i like it...
:twisted:
1st out goes the pathetic standard funnel crap and in goes the Factory velocity stacks, according to the advertising hype this is worth 2-3hp above 9000rpm, it may be true but i like to think of it as negligible power gain...it just shifts the power curve into the higher rpm range. see their claim here:
http://www.factorypro.com/Prod_Pages/y68/y..._vel_stacks.htm
and this is what it looks like installed on me r1:
2ndly, out goes the K&N filter and in goes the BMC. K&N served me well but I needed somthin better, as always...
if you compare profiles of K&N and BMC, it is obvious that the BMC has a larger filtration area which I would think equates to higher flow..this will complement the velocity stacks very well. and again, I would like to think of this mod as negligible power gain, just a power curve shifter.
here is the comparison picture:
and picture of the 2 together:
3rdly, probably the most important one....is the iginition advancer... I've gone 4 degrees advance.... on a standard engine on a hot day with pump fuel, it would probably make the r1 engine ping like hell...no probs..i'll just have to use octane booster all the time.. in theory this should give better response down low and few ponnies at the peak...
left one is the Factory advancer and the right is standard
pics of the two overlapped to see the diff:
Factory advancer installed:
last but not the least..was the final gearing change...
the standard is 16 front and 43 rear.....and I've gone 15 front and 45 rear (non hunting ratio).
this is equivalent of going 5 more at the rear...wooohooo!!!!
and of course I've gone 520 conversion at the same time...
oh...i almost forgot...also got Factory carb kit to install... but my carbs were already set to run slightly rich for the nitrous before so it is most likely not needed...but i got it ready just incase...
a quick test ride confirmed fullfilment of my objective....it is peaky as hell and those velocity stacks sound SIKKK!!!!
can't wait to take it out to the track...
I'll have the bike dynoed in the near future before the next trackday...and have it rejetted if it's required...and probably the next thing would be to get yoshi cams...
oh by the way OZ importer of the parts mentioned above is
http://www.matmladinimports.com.au/YZFR1.html
again...i made few additions to the good old r1 engine... since the bike has become track only, the nitrous had to go and I needed somethin to compensate...
the objective was to make the r1 as peaky as possible, I know this is most undesirable form of power delivery for most riders but that's how i like it...
:twisted:
1st out goes the pathetic standard funnel crap and in goes the Factory velocity stacks, according to the advertising hype this is worth 2-3hp above 9000rpm, it may be true but i like to think of it as negligible power gain...it just shifts the power curve into the higher rpm range. see their claim here:
http://www.factorypro.com/Prod_Pages/y68/y..._vel_stacks.htm
and this is what it looks like installed on me r1:
2ndly, out goes the K&N filter and in goes the BMC. K&N served me well but I needed somthin better, as always...
if you compare profiles of K&N and BMC, it is obvious that the BMC has a larger filtration area which I would think equates to higher flow..this will complement the velocity stacks very well. and again, I would like to think of this mod as negligible power gain, just a power curve shifter.
here is the comparison picture:
and picture of the 2 together:
3rdly, probably the most important one....is the iginition advancer... I've gone 4 degrees advance.... on a standard engine on a hot day with pump fuel, it would probably make the r1 engine ping like hell...no probs..i'll just have to use octane booster all the time.. in theory this should give better response down low and few ponnies at the peak...
left one is the Factory advancer and the right is standard
pics of the two overlapped to see the diff:
Factory advancer installed:
last but not the least..was the final gearing change...
the standard is 16 front and 43 rear.....and I've gone 15 front and 45 rear (non hunting ratio).
this is equivalent of going 5 more at the rear...wooohooo!!!!
and of course I've gone 520 conversion at the same time...
oh...i almost forgot...also got Factory carb kit to install... but my carbs were already set to run slightly rich for the nitrous before so it is most likely not needed...but i got it ready just incase...
a quick test ride confirmed fullfilment of my objective....it is peaky as hell and those velocity stacks sound SIKKK!!!!
can't wait to take it out to the track...
I'll have the bike dynoed in the near future before the next trackday...and have it rejetted if it's required...and probably the next thing would be to get yoshi cams...
oh by the way OZ importer of the parts mentioned above is
http://www.matmladinimports.com.au/YZFR1.html
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