sorry i cant take credit for this - it was devised by tony.mon on the vtr site & has been tried & tested by tony & others for over 6mth now without problems. (though i accept no responsibility if you do this & flip your bike lol) i didnt bother with it as i already had a 1/3 turn throttle on my bike off a rvf750 (rc45), but after my little incident last week when i accidentally gave it full throttle and pulled a monster wheelie, i decided i want more. or less, depending how you look at it. the idea is simply to increase the diameter of the throttle tube that the cable winds onto, so it winds to full throttle in less of a turn. std on the vtr is 1 1/2 turns, which is ridiculous as you need 2 handfulls to get full throttle = very tiring. it's dead easy to do this, but please, if you go for it, double check the throttle still snaps shut as normal and that there is still free play on full lock either way... it's also an ideal time to lube the cables for a smoother more reliable throttle action. 1mm nylon cap, 30mm diameter (tony used a film cannister but i used some plastic off an o-ring set) - it must be hard wearing plastic to avoid the cable cutting into it and jamming the cable, for obvious reasons. cut the end off trim to fit the throttle housing & smooth the edges off - there must be at least 1/2mm slack on the sides to be sure the throttle doesnt stick - but not more or you could trap the cable down the side (unlikely but not worth risking it) split the circle and trim to fit between the stops, slide under cables and pack with grease - didnt need to take the throttle or cables off mine to fit it. & just in case i forget lol , a little warning it's now full bore in about 1/5 of a turn and is mental to ride! :beer:
great mod i saw this in another forum a couple of months ago and it works a treat.can make slow controll tricky tho.great if your a full throttle kind of guy
tbh ive only had one mishap when i jerked it a bit going over a speed bump and shat meself a bit when it bunny hopped over it on one wheel! apart from that its not too twitchy.... obviously cautious at first lol but once its rolling its great. wouldnt recomment it on yours though!!!
not an easy task on a vtr cylinder layout means a turbo will only fit on the side which = burnt knees. get an old gixer for a winter project
Thats just absolutely mental turbo is bad enough but a supercharger too. Would not like my hand anywhere near that Supercharger belt
dont like the look of that chain either... imagine that snapping on you with 300 horse behind it.... leg off job that is :/
vvtr are you seriously thinkin of boostin your bike. this is how i started,,by lookin at anything with a turbo on on poo tube
not really, well not the vtr anyway as its carbed which opens up a whole can of worms lol. though i have got a little ihi turbo & manifold in the garage.... dunno what to do with it yet. was toying with fitting it to my old cbx before i sold it but cba lol! something i will do one day though but would need a decent donor bike with fi another thing i would like to try is to run a sacrificial cylinder, on a four maybe.... three cylinders firing as normal and producing power and one cylinder linked to the airbox - running it as a compressor to boost intake pressure. would have to be seriously regulated though as a 10:1 compression ratio would make 150psi boost lol!
wow never heard of the sacrificial cylinder idea, sounds interesting.i wouldnt like to turbo blow through carbs ether its all a bit hit and miss with fuel pressure and jetting.prais the lord for the pc3.
it's more steam engine technology, from 150 year ago lol (when are were a lad!) but someone said theyd seen a ducati drag racer running a similar set-up. another way of doing it is instead of having the sacrificial cylinder feeding high pressure boost straight into the throttle bodies, the high pressure air from the wasted cylinder could be used to drive a turbo with cool air instead of hot exhaust gas.... eliminating a lot of the problems associated with turbos, ie, cooling the turbine & charge... lots of plumbing possibilities with that one
