Fastassbanshee96 Posted December 24, 2010 Report Share Posted December 24, 2010 How can you tell if a carb is setup for alcohol or gas? I just got a set of 35mm pwk and was just trying to figure out. Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 24, 2010 Report Share Posted December 24, 2010 (edited) Alcohol carbs will have a powerjet on the filter side of the carb. Next, the main jet and dump tube will be drilled out larger. Usually in the .116-.118" range, sometimes as big as .120". Then they will have bigger pilots and a physically smaller needle to flow more fuel. The needles will have a faster taper and a shorter overall length compared to a gas needle. If they are keihin carbs your needles would be like an EGL or EGQ... around in there. Gas needles are usually a C or D series. If they have drilled mains and dumps and the alcohol needles, but no powerjets then whoever set them up is a tard-o. Edited December 24, 2010 by BigRed350x Quote Link to comment Share on other sites More sharing options...
Fastassbanshee96 Posted December 24, 2010 Author Report Share Posted December 24, 2010 Ok well I just spoke with wicked and he confirmed that they were alky. I bought them from a guy on here who told me they were setup for gas. What would happen if I switch the needle back and jets and run gas thru them. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted December 24, 2010 Report Share Posted December 24, 2010 It wouldnt run very well once you drill the dump tube there is no going back Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 24, 2010 Report Share Posted December 24, 2010 Ok well I just spoke with wicked and he confirmed that they were alky. I bought them from a guy on here who told me they were setup for gas. What would happen if I switch the needle back and jets and run gas thru them. It would run like poo. If the dump tube is drilled out and you put a gas needle in there, the gas needle won't be able to plug up the dump tube like it should. You would be pulling fuel around the needle all the time, when its not supposed to, making you really rich. It would never have a chance to clean out and would just bog everywhere. I had a set of carbs like this one time and it was a lost cause. I scrapped what parts I could off of them to use as spare parts on other carbs and chucked them in the trash. If you want gas carbs you could always sell these with the correct advertisement as alcohol carbs and use that money to buy gas carbs. Or work up a trade. Quote Link to comment Share on other sites More sharing options...
Fastassbanshee96 Posted December 24, 2010 Author Report Share Posted December 24, 2010 Thanks for all the info. That's what I was thinking. The seller said he didn't know they were alky carbs and he would fully refund me the money. Quote Link to comment Share on other sites More sharing options...
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