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Joemomma

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Since: Feb 18, 2004
Posts: 294



(Msg. 1) Posted: Mon Jul 25, 2005 7:51 pm
Post subject: Hot Cams Help!
Archived from groups: rec>motorcycles>dirt (more info?)
My buddy Calvin, just put one in his son's crf250r, (and I just ordered
one) and the darn thing won't start when hot. Valves are in spec
(reshimed) and the degree marks line up too! I caught hot cams on TT and
it sounds like a bad cam (not that uncommon). Stock jetting, plug is
clean, but the pipe is grey, not dark. When it runs it hauls butt! Any
ideas before we put the stock cam back in and reshim! We are taking the
kids to Washougal thursday. No time for a replacement!

Joe

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user535

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Since: Feb 02, 2005
Posts: 8



(Msg. 2) Posted: Tue Jul 26, 2005 1:55 am
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
If the exhaust is grey now, and was darker before, then it sounds like the
jetting is too lean now.

Take it to someone who knows what they're doing jetting-wise to get it set
up properly. It will definitely be worth the time and effort in the long
run.

Matt

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MX Tuner

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Since: Mar 07, 2005
Posts: 375



(Msg. 3) Posted: Tue Jul 26, 2005 6:13 pm
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Mon, 25 Jul 2005 19:51:18 -0700, Joemomma
blathered:

>My buddy Calvin, just put one in his son's crf250r, (and I just ordered
>one) and the darn thing won't start when hot. Valves are in spec
>(reshimed) and the degree marks line up too! I caught hot cams on TT and
>it sounds like a bad cam (not that uncommon). Stock jetting, plug is
>clean, but the pipe is grey, not dark. When it runs it hauls butt! Any
>ideas before we put the stock cam back in and reshim! We are taking the
>kids to Washougal thursday. No time for a replacement!

The fuel screw is too rich. Lean the fuel screw out 1/4 turn at a time
until it starts hot. 1/4 turn is a big change. You may have to fine
tune it once you get it in the ballpark.

MX Tuner
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