Octane 42mm Keihin Race Carbs on Octane 777

[cjbchopper]

I have read so much about the weaknesses of the stock Octane carbs so I decided to try another setup. I had a couple Keihin 42mm Race carbs from a Kawi 750 I had. I took the throttle shaft out of the stock octane carbs and installed it into these to get the right spacing. I then port matched the intake mani to the large carb bore. Has anyone tried this setup? How do these perform compared to the stock carbs? I am also running dual pulsers and V-force reeds. Any jetting suggestions?

 

[cjbchopper]

Also, what is everyone running for timing on the 777? I know the flywheel is adjustable, just wondering what others have tried with advancing the timing.

 

[Grant]

Just a guess, but they are probably going to kick ass.

Are those the stock air filter cups? Its almost like they were designed for those carbs since there is a smooth transition / no ledge.

 

[cjbchopper]

Yes, they are the stock filter adapters. Has anyone messed with the timing adjustment on the 777 flywheel?

 

[Wolf Child]

randy @ watcon

 

[RMBC Freeride]

prem1x is running those same carbs on his octane (i think). you might want to send him a pm.

im running a set of novi 46's and they rock!

I don't think adjusting the flywheel is common practice. rather you get your cdi reprogrammed with an entirely different curve. watcon can do it.
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[octane972]

I'm running them on mine and they run pretty well, but I'm still playing with jetting. I recommend Watcon reprogram on the timing.

 

[Wolf Child]

48mm Novis here and a timing reprogram.

 

[cjbchopper]

Thanks for the input, Randy has been helpful but he said he has very little experience with these Keihin 42's. I just picked up a FPP Dry pipe for it, so that will make setting up these carbs a little more difficult. I am sending out my CDI for Watcon tomorrow.