looking for a little guidance

All Engine, Clutch, Chains, and Sprockets Stuff Here.
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ThaBing
Posts: 8
Joined: July 18th, 2013, 12:13 pm

looking for a little guidance

Post by ThaBing »

Yes I have read the endless threads on here about jetting. But I'm still a little lost.

CR500 aluminum frame with a 1990 CR500 engine.
39 PWK
Stock engine
PC Pipe and silencer
Boyesen Rad valve with torque spacer

55 Pilot
172 main
1 1/2 A/S
7 slide
DGN needle in the 3rd position.

About 800 ft elevation. 50 degrees. Bike starts great cold. When it's hot, you have to hold the throttle wide open to start. Seems to be a little rich down low, and a little lean on top.

Any help would be greatly appreciated.
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MojoScojo
Posts: 1796
Joined: June 8th, 2007, 8:42 pm
Location: Rathdrum Idaho

Post by MojoScojo »

55 pilot in a PWK seems way fat.
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
ThaBing
Posts: 8
Joined: July 18th, 2013, 12:13 pm

Post by ThaBing »

That's exactly how it acts. Need to order a couple more jets.
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2strokeforever
Posts: 1524
Joined: November 13th, 2009, 1:04 pm
Location: Vernon B.C Canada

Post by 2strokeforever »

put a 42 in there... start at 1/2 turn on the airscrew and turn out if you want it leaner
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish
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AlisoBob
"Hoon-father"
Posts: 15404
Joined: May 31st, 2007, 6:39 pm
Location: Aliso Viejo Ca

Post by AlisoBob »

Yup... If you can start it cold... with the choke off.... its too fat on the pilot.
ThaBing
Posts: 8
Joined: July 18th, 2013, 12:13 pm

Post by ThaBing »

About 60 degrees out and I can start it without the choke. dead cold. With the bike all warmed up, I have to hold the throttle wide open to get it to start.
Just ordered up some more pilots today. Got a 42, 45, and 48 coming.
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