OK so heres the deal, just had my motor built (for MX), fully ported head, valves with dual rate springs, je 11.5-1 piston, and web 110 cams.
now heres the problem, no power differance. I had it tuned in on the dyno and it was only making 44hp!!! (might as well kept it stock)
both the dyno guy and my motor builder are saying it the carb, it sucks!!!!
is that the case? if so what am I looking for, carb wise? TM45-48? lectron 46? what ever the case maybe this is a motocross bike so the carb cant have any dead spots.

any help or advice would be great!

thanks guys

 

Do you have anything else done? Filter, CDI, what pipe is on there? Did you have a stock comparison on that same dyno with similar weather conditions.....

 

full big gun pipe, rwr cdi, open air box with a foam filter. and no I dident have it dynoed before! dyno it 3 hr away!

 

What attitude are you at ???

 

Ok, should be more. What fuel are you running, what altitude, what was the A/F mixture at? Can you post the charts? Who did the porting?

 

Im at sea level, I run VP C12 fuel, I don't have the chart, the head work was done by PCM

 

Well it would seem you may be at the limits of the Carb with out making OMRs mods to it. You may want to either make his changes, or go get a TM45 or a Lectron 46hv. Both will cover you for exactly what you need. Neither has a dead spot when set up correctly and you will more then likely see some big jumps in your performance.

I think you are over octaned, you do not need more then 110. And you may be getting limited by the 110 web cams. Those are not much of an improvement.

 

I dident want the 110 cams but dident have the extra cash for the shim under bucket.

what about the fcr carbs? everyone has been pushing me that way and thats what I would like to go with, but I cant find anything bigger then a 41mm

 

If you are thinking of going duals you do not want larger then a 40mm....

 

I really just wanted to run a single! duals are just to much$$$$...... as of now I guess the tm45 is the best choice? being its not a drag bike.