yamaha11 Posted January 11, 2009 Report Posted January 11, 2009 looking for some carbs for my 421. i have a spare set of 35mm pwks and a set of 38mm pjs. im not sure weather im running gas or alky. can some one tell me what is going to be the easist carbs to tune. i could have my 35mm bored out? Quote
locogato11283 Posted January 11, 2009 Report Posted January 11, 2009 i say just run the 35mm pwk like they are. thats what i ran on my 421. Quote
yamaha11 Posted January 11, 2009 Author Report Posted January 11, 2009 i say just run the 35mm pwk like they are. thats what i ran on my 421. for drag racing Quote
tedd1 Posted January 11, 2009 Report Posted January 11, 2009 Kevin recommended and I run 39 PWKs on mine. I drag mostly, but they work well for just riding... Quote
njbanshee Posted January 11, 2009 Report Posted January 11, 2009 I run 39's for drag racing. You need to feed that beast. I even have the larger bowls on mine too. Quote
yamaha11 Posted January 11, 2009 Author Report Posted January 11, 2009 I run 39's for drag racing. You need to feed that beast. I even have the larger bowls on mine too. on gas or alky Quote
kawiking Posted January 11, 2009 Report Posted January 11, 2009 35 pwk's wouldnt be a bad carb-- for a dune bike. prob alittle better low end.. i run 39 pwk's set up on alky (by 99fastshee).. Quote
locogato11283 Posted January 11, 2009 Report Posted January 11, 2009 for drag racing id say you can run either. for dragging the 39 would prolly be better with some billet bowls. Quote
yamaha11 Posted January 11, 2009 Author Report Posted January 11, 2009 id say you can run either. for dragging the 39 would prolly be better with some billet bowls. is alky hard to tune never ran it before? Quote
locogato11283 Posted January 11, 2009 Report Posted January 11, 2009 is alky hard to tune never ran it before? neither have i. get ahold of dajogejr. i do know you have to convert your carbs to be able to run it. Quote
kawiking Posted January 11, 2009 Report Posted January 11, 2009 ive alwaysed heard if u switch ur pwk's over.. u cant go back to gas.. i think u can with mukini's and lectrons. iv e heard alky is easier to tune once u get it close... my bike is set up rich.... but runs great hollar at daj,bigboybanshee,badassbanhsee,fouledout421,99fastshee,fastoys or kevin herr.. im sure they can tell u more about the alky set up. it was around $100 to have my carbs set up on alky Quote
sheefreak Posted January 11, 2009 Report Posted January 11, 2009 Tuning alky is easy if you know how to read your plugs. W/the 39 PWK's you would be safe to start at 120 mains, 55 pilot, power jet wide open and start closing down from there. When I get back from running I will post some spark plugs to show you what to and not to do. The beautiful thing about alky is it will still run pretty good pig rich. Quote
sheefreak Posted January 11, 2009 Report Posted January 11, 2009 Tuning alky is easy if you know how to read your plugs. W/the 39 PWK's you would be safe to start at 120 mains, 55 pilot, power jet wide open and start closing down from there. When I get back from running I will post some spark plugs to show you what to and not to do. The beautiful thing about alky is it will still run pretty good pig rich. Here is a pic that gives you an idea of what I am talking about. Ideally where you see the black on the base of the plug you want the black to burn to 3 and 9 o clock. This is referred to as showing heat on the plug. As you can see mine is at something like 4 and 10, but hopefully you get the idea. When you first start and it is rich, there will be no color on the base, as a matter of fact the plug will look brand new and just be wet. It takes a few runs to get color on a new plug, so I usually take 3 runs at the beginning of the day and check plug. If it looks rich close the PJ down a half turn and repeat. You want to do this till you start to show a little color. You don't have to lean it to the point where it is spot on at 3 and 9 for it to run good. As a matter of fact, at the dunes I just tune until just the ground strap turns color. It will run good and I and many others refer to this as fat and happy. When it is rich it will litterally spray raw fuel out of the pipe. You can put your hand behind the pipes and wet your hand. Biggest thing to remember w/alky is untill you start to get the hang of it, make sure it is never on the lean side. A lean alky setup will burn pistons up very quickly. All in all, the power gain is well worth the learning curve. If you have any other questions, post em up, I or the above mentioned will be able to elaborate further. Quote
1996dragshee Posted January 11, 2009 Report Posted January 11, 2009 Once you convert to alky with pwks there's no going back to gas.Also,once you convert to alky you will never wanna go back to gas.. Quote
yamaha11 Posted January 12, 2009 Author Report Posted January 12, 2009 Once you convert to alky with pwks there's no going back to gas.Also,once you convert to alky you will never wanna go back to gas.. [/quote is perjing with regular gas after running with alky hard or farly simlple. also is it hard to learn or just takes some time and parcatice Quote
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