can any one tell me what i need to have done to convert a 270 carb. fom gas to alch. i was told the only thing i need is to have it drilled then some one else told me i need a new carb. can any one help my email is
farmbo0810@hotmail.com plz let me know if you know any thing ty

I know there is a difference one is the power valve and I am pretty sure the floats are different. An alcohol motor requires less fuel than a has motor so the jetting is different. I always just bought the alky carb from ESR. I never converted a gas to alcohol. Find more info at hyperracing.com or rtschassis.com the sell the carb kits.

I know there is a difference one is the power valve and I am pretty sure the floats are different. An alcohol motor requires less fuel than a has motor so the jetting is different. I always just bought the alky carb from ESR. I never converted a gas to alcohol. Find more info at hyperracing.com or rtschassis.com the sell the carb kits.

I'm 100% positive that an engine needs almost twice as much methanol as compared to a gas engine. Hence with the 600's, our injectors are twice the size as factory.

I wasn't sure about that I just new there was a difference between the carbs and one required alot more fuel than the other hence the reason for the power valve I guess.

There are a lot of differences between the two uses. 1) The carb needs to be bored. A stock khnein (sp?) carb is 39-39.5 mm. The size used on a micro is 40.5. 2) You must run a power jet or top end jet. It is a have to item. The motors run at peek rpms for to long and will starve for fuel on top end and burn. 3) You don't need new floats. They use stock floats. 4) The needle and slides are cut different. The modified needle and slides are designed to let more fuel into the motor.
I used to think the needle only controlled the low end take off, but after years of learning about two strokes I have found that the needle is in use all the time.
Hope this helps

Luke Fogg

are you changing a stock bike carb or an esr carb? the esr carb on gas you just need to hookup the power value - put a bottom bowl on without the brass tube in it-Change the slider needle out to a esr needle - and install esr jet. that it.

Robert

the dump tube is reamed larger for methanol. not sure what a power value is, but a power jet tube is mounted to the carb as a supplemental source of fuel for top end. you CAN run a carb off the main jet only if it is reamed large enough with the proper needle and jetting. BAM and hyper did this in the 90's with success. however, all have now made power jets the norm. the slow jets are different for gas as well. the slide is cut differently as said above. the needles are ground differently also, as said above. you CAN use a stock 39mm carb without boring it to 40.5 or 41mm like the old hyper stuff. the big bell option is just that, a option. eddie used it to sell more carbs to all the guys that had his carbs already. he claimed it used the velocity stack theory, but it seemed to be an extremely intelligent marketing tool. sell more carbs and air cleaners. BUT...99% of all 2-stroke micro racers are on the big bell wagon, and they work well. soooo...get a slide and needle for methanol, bore the dump tube, install a power jet tube( and ream that larger), remove the vertical brass tube from the bowl and ream that tube on the bottom of the bowl and blend it inside so there is no restriction. connect that to the power jet, and get the proper main jets (104-118 on average) and power jets(70-100 on average) and set the floats and needle and try it.

OR call rts or ESR and get the package and save yourself the time and aggrevation. eddie still sells carbs and pipes and anything you could get before, just now you must buy direct from him. he no longer uses any dealers.

if i missed anything, please forgive me.