Make a slow bike fast - KZ750 Twin

[ex119x]

I think your choices in carbs would be legal with WERA. They are superbike rules and only specify that the carb type has to have been available prior to the cut-off date. The basic principle of the FCR is that it is a flat slide not round or oval. I was racing flat slide carbs in the early 80's. I also don't think anybody in the vintage classes in WERA would protest. AHRMA on the other hand is very specific about flat slide carbs and you probably would get protested.

 

[beachcomber]

Why on earth would you build a track bike out of a 40 yr old commuter bike?


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'Cos he can .........

 

[beachcomber]

These were around in the 80's ???? !!!!!

Yep and twin plug heads - had them on my various Triumph twins.

Maybe not the Nitrous though.

 

[ex119x]

I had a pair of 30mm lectrons on my cb350 race bike in about 1982. They were as flatslide as you can get, and boy would they stick wide open in the rain.

 

[doc_rot]

thats good to know. I have heard that the guys donig vintage racing with WERA are pretty relaxed.

 

[cyclocrossfool]

thats good to know. I have heard that the guys donig vintage racing with WERA are pretty relaxed.

i think there "relaxed" because of the low vintage race turnouts. of the 15 races i did with wera in 2020 (V4,5, 6LW) i was the only one on the grid in 12 of them.

 

[doc_rot]

hmmm. maybe it should be just a track bike. in that instnce Id really love to do a USD fork purely because i have never done it.

 

[cyclocrossfool]

hmmm. maybe it should be just a track bike. in that instnce Id really love to do a USD fork purely because i have never done it.

no and no, just race, other then wera theres ahrma, uscra. putting usd forks on it means it will never see a vintage grid. do you really want to do track days with that bike with nothing but modern bikes? wont be fun. get on the track already.

 

[canyoncarver]

Man, I need to get back on track days. What a blast.

 

[doc_rot]

carbs for Bonneville 900, reduced the spacing by about a 1/2" to fit port spacing of KZ750. I also turned new spigots to fit in the stock carb boots, blocked off TPS, etc... lots of fiddly little bits. I still need to port match the carb boots to my ported head.

 

[doc_rot]

This is where the “poor financial decisions” portion of this build comes in to play. Custom color on the wheels.

 

[ridesolo]

This is where the “poor financial decisions” portion of this build comes in to play. Custom color on the wheels.

Yeah but they are purty!