Hard Starting!

[87sheerips]

OK, went riding yesterday and stopped to take a break. I try starting, and nothing until about 49 kicks later. I know i need rings, but its running great when it starts. Really weird. Any ideas??

[Hulio-mv]

compression test you said it rings

[Ultimateduner]

Well my cousin has that same problem, he needs a rings bad and pistons. Anyways same with him, we can kick that bitch for 20 mins and then it starts up and runs great.I agree you probally need to test your compression, but if you know you need rings, I'd start there.

[87sheerips]

yea, but i just dont feel like tearin it down!! haha , so why is it that it is so hard to start, but performance is not affected? Im a little new to why bad rings have this affect.

[2003LimitedBanshee]

yea, but i just dont feel like tearin it down!! haha  , so why is it that it is so hard to start, but performance is not affected?  Im a little new to why bad rings have this affect.

454214[/snapback]

 

Seat of the pants feel may not be drastically affected, but you should see differences if you had it strapped to a dyno. The reason why is because when the engine is cold, with the rings being worn, the compression is lower. The lower compression in turn leads to lower cylinder temperatures, making it harder yet to get ignition (not simply spark, but combustion) for starting. The major key here is temperature, after you kick it 100+ times (or whatever) you've developed enough cylinder temperature that it will finally combust. The reason why you don't see seat of the pants difference is because once it is running heat causes the metal to expand (very slightly but remember the clearances we are talking about), tightening the ring to cylinder wall clearance, and giving you better compression than when it is stone cold. Hope that helps, and yeah it kinda sounds like you need rings, but a compression check will tell for sure.

[87sheerips]

ahhh, i agree but... After I posted this, i went to start the next morning, and bam!! second kick she fires. It seems to be starting easier cold, and harder warm. Thats why im kinda asss backwards here.

[sheefreak]

The only way that would make sense is if you have upped your pilot jet too much. Cause then, you would have plenty of fuel to start cold, but too much once it warmed up and would be flooding it. But your best bet, again, would be to do that compression test, then you would no longer be guessing.

[87sheerips]

The only way that would make sense is if you have upped your pilot jet too much.  Cause then, you would have plenty of fuel to start cold, but too much once it warmed up and would be flooding it.  But your best bet, again, would be to do that compression test, then you would no longer be guessing.

454681[/snapback]

 

 

OK, my supprising comp. tests are in!! a lil over 140 in the left, and 160 in the right. I guess the rings arent that bad. I did rejet my pilot from running 150 in 80 degree, 155 in like 50-60 degree, then to 160s for 30 degree. Running keihn of course. Maybe i should try the 155 again???

[sheefreak]

I don't have any experience w/the khein's, but it is worth a shot. I don't like how they are 20psi difference, but I wouldn't think that should affect starting. Before you change your pilots, try opening your airscews all the way up, if you haven't already done so, and see if that helps. If you try going down once or twice on the pilots, and that doesn't help, I would start to worry about an intermittent or failing electrical problem.

[badassbanshee479]

I am thinking you are changeing the main jets if you are running a 160, my 39mm kehiens only have a 60 piolet in them where are your air screws set at?? if you turn them in it will make it richer and if you turn them out it will make it leaner, if you have to go pasted like 2.5-3 turns out you need a leaner piolet if you have to go under a half a turn you need a richer piolet I would say, turn the air screws all the way in, then back them out 2 turns and see if this helps.

[87sheerips]

my air screws are 1 1/2 turns out. And sorry, i was talking about my main jets. I just repleced my shot cdi with a used one which i dont think is the prob. Il try the air screw to try and lean it out. Its running prime so i think the main is right on. Thanks for all the quick responses and good input!!!