New to the site and 2 strokes

[badassbob]

I got her yesterday she has fmf sst, power core 2, pro design kn, 320 or 330 main jets, pro tech pistons? cool head with 21 cc domes, wb boost bottle, MSD and v force reeds. Ran her yesterday it was 40-45 she hauled ass very fast. This morning, woke up saw it was 30 even, wanted to see how she ran in the cold, started up second kick first one was kinda girly kick (I just woke up) pushed her outside, let here idle for about ten min while giving her small revs, putted around for 5 min in first till the crankcase was warm, then rode her fairly hard for 20 min or so. She didnt sputter or anything, ran great. but i noticed a good loss in hp, nothing serious but quite a good dif it also seemed a tad harder to get into the band but still more then rideable. I know I should rejet for the winter and I intend on it. I never tried to jet a two stroke never mind a dual cylinder. My main question is, When I put in the bigger mains should I chnage the pilot or clip at all? or just leave it alone if it works good? I posted this on www.Bluetraxx.com and someone said something about hurting the cylinder walls and loseing compression, there saying thats why it felt weaker. I can see from a hard long ride but from 20 min. you guys realy think I hurt the compression or walls?

Edited December 15, 2004 by badassbob

[Ducman]

I posted this on www.Bluetraxx.com and someone said something about hurting the cylinder walls and loseing compression, there saying thats why it felt weaker. I can see from a hard long ride but from 20 min. you guys realy think I hurt the compression or walls?

293509[/snapback]

 

 

I doubt it. Probably richen up the needle 1 clip and maybe 1 size larger main and problem solved.

[Banshee17Racing]

I don't think you hurt anything from riding for 20 minutes. But I would go up a size on the main, I never mess with the pilot or clip at all when dealing with weather. I know some do...some don't. I guess it depends on how she ran when it was around 70 degrees. 30-40 degrees isn't a big difference. Somebody correct me if I'm wrong but i'm pretty sure the saying is....every 20 degrees colder is one main size bigger.

 

Welcome to the HQ ...and learn to love jetting!

[Banchetta]

I'd go up a couple of sizes to start especially where its only getting colder. Every 15-20 degress out is one jet size. I used to jet for70-90 in the winter then rejet for 30 degrees in the winter. Never had a problem, but I went up 3 sizes for winter. You might want to try raising the needles to. I don't change mine from seasons, but you might have some nice hidden power in there and not even realize it. Just try it and do the changes separately so you know where the gains were.

[BenBB]

Banchetta is right on as usual, I wouldn't worry about the needles until you dial in the mains, then you can try a different clip position and see if it helps or not...the only other adjustment you might make for the colder weather is the airscrews, but if she starts right up and pulls hard off idle, it's prolly fine.

[Wallrat]

If you don't already know how to read your spark plugs then its time to learn. BenBB has a great little Jetting FAQ that he wrote up linked in his Sig^

 

Ideally you'd like to do a plug chop everytime you change the jetting but learning just how to read a plug while on a ride can be very useful as well. Congrats on the new bike and welcome to the HQ!

[badassbob]

Thanks for all the posts. I'm gonna order some bigger jets next week. Will get back to you guys on how it goes. -Bob

[superchicken]

you said you have an msd?r u meaning the msd ignition cdi.the last one i messed with you had to recharge the batteryfor every four hours of riding.maybe thats the problem