High idle on cold start and other questions

[Nash Jesso]

My shee starts first kick but idles high,it calms down as soon as i pull the choke and idles fine,anybody know why?

 

I also checked my plugs and they are black,so im guessing im on the rich side,my jetting is stock(the bike is bone stock) and gas is mixed 40:1,is this a problem?

 

While I had the plugs out i checked compression,both cylinders peaked at 100 psi at about 10 kicks.

 

And is there a difference between a br9es plug and a br8es plug,when i got my shee it had the br9 and that is currently still in there,would switching to a br8es be better?

 

Thank to anyone who can help

[sleeper06]

Change your plugs back or change them in general if they look bad

[Nash Jesso]

I held throttle wide open,kicked till it peaked.tester read 100

[Nash Jesso]

What i thought,no loss in power and has alot of get up and go. Might ride it with caution till the end of the season and rebuild this winter

[trickedcarbine]

^ solid plan. Gives you time to start accumulating parts and assess any hurdles in the road.

[Nash Jesso]

Yeah found out not using choke on start up caused the rev problem. Did 3 tests per cylinder and all 3 peaked at 100psi.even though i havent lost and performance or and noticeable amount of power loss will it be safe to ride without any worries?

[Nash Jesso]

Hasnt given bad readings for our sleds,its not a 10$ one so ill say im pretty sure its reading right. Did a leak down,found none.ill check to see if my pilot jet is dirty again but it only idles high for about 30 seconds if i dont choke it. When its warm it idles fine.

[Nash Jesso]

Yeah thats the plan,new top end,crank seals and all gaskets will be changed regardless of the condition the current ones are in.