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Try putting a timing light on the bike and kicking it over.This usually requires an
 assistant.I have had numerous occasions where a bad coil will spark with the plug on the head but not under compression this will tell the tale for you.

The needle jet is what the main screws into.Push it out from the bottom toward top.The needle jets are lettered and numbered logically the advice about the Sudco book is dead on.It's cheap and real careful reading will make you an expert.Pro Flo has them for the same price as from Sudco.The relationship of needle to needle jet is critical.Needles differ by taper the main factor is the size of the needle jet and how it relates to the needle.They are listed by general ranges richer to leaner in the Sudco book.

 

Correction typo 6FJ6 needle.

 

Thom what needle jet are you running I just fine tuned a 360 Bul which should breath somewhat similarly.As follows 40 pilot (this is a flattracker so the pilot is one richer than I think is optimum.) 6f76 needle with a P-5 needle jet in middle positon ,again this is slightly richer than I'd jet an MXer.3.0 slide filed slightly to lean it just a tad.I siezed it on a half mile with a 270 main but that is about right for a short track.This is on a 36 R/S.1.5 turns on you air jet is right, try to find the right pilot for that setting.Do plug chops on you main and look for a light brown color.Bultaco's need to be somewhat richer and flat track is a different environment but this should get you close.I tried a P-8 nj with a 6DP1 but the above combo is much better in the mid range.Frank

 

Mike I could touch Bradley the little snot nosed whelp,I graduated from ISU and got my masters from IU then moved to Chicago and eventually took root in Iowa.My sister lives in Otterbein,my aunt and uncle lived in Delphi til their deaths,little world.I was probably slightly before your time if Brad was real fast,do you remember the hill at Staunton?I saw a guy start a CT175 backwards and dump the clutch at full revs half way up that monster,was it you?lol

 

Mike I could touch Bradley the little snot nosed whelp,I graduated from ISU and got my masters from IU then moved to Chicago and eventually took root in Iowa.My sister lives in Otterbein,my aunt and uncle lived in Delphi til their deaths,little world.I was probably slightly before your time if Brad was real fast,do you remember the hill at Staunton?I saw a guy start a CT175 backwards and dump the clutch at full revs half way up that monster,was it you?lol

 

I grew up about twenty miles from Attica,Ind.and there was no one interested in offroad riding (late 60's early 70's) didn't discover that til I moved to Terre Haute.I haven't lived in Indiana in thirty years, is there still a  group called Terre Haute Competition riders? I was a founding member of that group and help build both M/X tracks north of town. Any Hoosiers remember this? I rode a Maico for Lake's in West Terre Haute.Penton's were a rare sight but one showed up ocassionaly.

 

Randy was a day late reading your post.That would have worked well and the price was right.Thanks,Frank

 

If you have a lot of patience soaking them in brake fluid will sometimes permenantly soften them as opposed to just softening them up to work with them,I just pulled the one for my Monark out of the fluid after two weeks and it has improved from the concrete-like texture it was.In the interim since Monark parts aren't abundant I have been using an auto radiator hose of the correct diamter.

 

This head gasket business just got weirder.The top of the piston was pretty beat up as was the combustion chamber so I took it down.It was evident a wrist pin keeper or something had come loose and really gouged the cylinder.When I got ready to remove the wrist pin it pushed right out.The keeper was gone and had never been replaced.I just got this bike so I woudl have known if this had happened so I have run the bike several hours with no pin keeper.The pin push out really easily.What stopped it for catching on a transfer port and stopping the whole thing?I posted on the wanted page for a cylinder the gouges are so deep I don't think even 60 thou will clean it up and it is at 54.5mm now.Any help on the cylinder appreciated,Frank.

 

John thanks,Frank.

 

OK John you got me going now.Went thru the carb pile and the Lectron's we have are 38's or so and pretty crapped out.Why do you keep this stuff?Anyone have a 30mm and rods for a 125? frank

 

Depends what you want to spend,as you said,Progressive's (especially if you have your own springs) are hard to beat for the money and the are pretty nice folks.Frank.

 

I would like to read the article,we have some Lectron's kicking around somewhere,and I'd sure revisit the deal if it would work.I have the 2003 AHRMA rule book and perhaps you are right about the age.I don't read past 74 cause that's the newest I have.Frank.

 

John in the events I have attended AHRMA won't allow a Lectron.The rule states no flatslide carbs or Lectrons. The power jet/ pumper rule is seperate.My experience with this carb has been less than good.Don Vesco could make them work and  as you stated John Penton did.I am not in that league.Frank