Lightweight Supersport Legality

[benprobst]

So for clarity sake - if Trace were to take the bottom half of a 2nd gen bolt up the heads et al from his first gen and replace or remove the generator and run carbs - it technically wouldn't be legal? and I'm pretty sure you couldn't tell the difference visually or hp/torque wise with the above being true - just asking for future reference if I blow up teh ss motor...again....

Does a second generation SV have fuel injection?


If you answered correctly then you answered your own question. You must keep the stock fueling method. It doesnt matter if you change half of the parts on the motor, you have to keep the stock fueling. The above scenario is illegal in many other ways as well.

[tzracer]

It is pretty straight forward.

Do the 1st gen and 2nd gen cases have the same part number?

If not, they cannot be substituted.

[twilkinson3]

Personally I've got enough in parts at the moment to rebuild, but as the gen1s age and become less available motor wise and the gen2s are still in production I was asking from the replacement part perspective - plan on doing this a while hehe - I'll have to look up the part numbers one of these days but there is physically no difference in the engine components (bottom half) between a gen1 and gen2 outside the parts referenced above

For ben - I was referring to putting a 2nd gen crankcase/tranny in a 1st gen frame in my original question thus satisfying keeping the bike's original fuelling method

As always - appreciate the info

[benprobst]

Personally I've got enough in parts at the moment to rebuild, but as the gen1s age and become less available motor wise and the gen2s are still in production I was asking from the replacement part perspective - plan on doing this a while hehe - I'll have to look up the part numbers one of these days but there is physically no difference in the engine components (bottom half) between a gen1 and gen2 outside the parts referenced above
For ben - I was referring to putting a 2nd gen crankcase/tranny in a 1st gen frame in my original question thus satisfying keeping the bike's original fuelling method
As always - appreciate the info

You are el wrongo, as they say in spanish. The 1st gen and 2nd gen bottom end share approx. zero parts. The crank is different, the crank configuration and adjustability is different, the cases are different, the rods are different, the gaskets are different, the clutch is different, the clutch basket is different, the flywheel is different, the case covers and configuration is different, the oil ports are different, the trans is different and the list keeps going.

[123user]

For future reference... don't ask anybody "if" you can do it.  Just do it, put a fairing on the bike so no one can see, and wait until you're finishing in the top 3 to worry about it.

Its like going into the quicky-mart and telling the clerk you're going to steal something and then handing him your business card.  If your gonna cheat, do it quitely.

[tstruyk]

You are el wrongo, as they say in spanish. The 1st gen and 2nd gen bottom end share approx. zero parts. The crank is different, the crank configuration and adjustability is different, the cases are different, the rods are different, the gaskets are different, the clutch is different, the clutch basket is different, the flywheel is different, the case covers and configuration is different, the oil ports are different, the trans is different and the list keeps going.

so what youre saying is you can interchange the parts? 

[backMARKr]

so what youre saying is you can interchange the parts? 

why is everything an argument with you?

[tstruyk]

why is everything an argument with you?

Too much time around Jasa...  ::)

[gpz11]

I probably would have just done the swap, kept the carbs, and keep my mouth shut.

You'd need a 2nd gen exhaust to clear the oil cooler though.

[backMARKr]

I probably would have just done the swap, kept the carbs, and keep my mouth shut.

You'd need a 2nd gen exhaust to clear the oil cooler though.

stop bein logical Chuck!

[roadracer162]

anything is legal as long as they don't check. think of it as restrictor plate racing.

[twilkinson3]

So I'm back to being curious, what on a 2nd gen crankshaft is adjustable?

I'm not a parts fiche geek but I was under the impression that nothing much changed in the bottom half of the motor on a gen2 - meh that curiosity satisfied to any rate and I think Trace got his answer in spades....