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View Full Version : what to set decomp for st.2 hc?


KrazyKeith
11-27-2006, 09:28 AM
when I installed my cam I left the decompressor clearance stock. Is that ok or should I change it. It doesnt really start all that good. When you crank it comes to a spot where it almost stops. Is this normal or do I need to adjust. And if I need to adjust I have no compression gauge so I need to know what clearance. If I can get this thing to start better Im goin w/ a 14:1.
RedRacer44
11-27-2006, 10:50 AM
On my '06 450ER w/ HC Stage2, we had to bump it up to .026 or .028.....one of the two, cant remember. Thats 26 thousandths or 28 thousandths.....

Thats how I got mine to start. Stock decompression setting will not work....
KrazyKeith
11-27-2006, 04:33 PM
thanks, I'll try that.
tooanxiousii
11-27-2006, 08:04 PM
I'm running 1 14:1 blawin piston with a HC2 and I use stock setting for my decompression !! Starts great
baker250r
11-27-2006, 09:05 PM
Originally posted by tooanxiousii
I'm running 1 14:1 blawin piston with a HC2 and I use stock setting for my decompression !! Starts great

r u running a battery with more cranking amps tho?
tooanxiousii
11-28-2006, 07:02 AM
No.. Stock Battery!!!

Set your decompression at .010 of a inch
KrazyKeith
11-28-2006, 05:07 PM
Hmm......?
tooanxiousii
11-28-2006, 06:07 PM
If you spend the time and set everything perfect it will start
ricks450
11-30-2006, 11:06 PM
sounds to me your valves are out of ajustment.If your ex. valves is opening to late the air has know way out of motor. Which ex. valves would be to loose. It can cause the problem your having. I run 11.5 to 1 piston and stage2 hotcam and run stock setting on decompression vavle. It starts fine.Oh yea dont ever give it gas while trying to start it, it will do that, most of the time it will kickback.But you might want to check your valves.good luck man!
KrazyKeith
12-02-2006, 10:57 AM
Originally posted by ricks450
sounds to me your valves are out of ajustment.If your ex. valves is opening to late the air has know way out of motor. Which ex. valves would be to loose. It can cause the problem your having. I run 11.5 to 1 piston and stage2 hotcam and run stock setting on decompression vavle. It starts fine.Oh yea dont ever give it gas while trying to start it, it will do that, most of the time it will kickback.But you might want to check your valves.good luck man!
you are right the ex valves were out I did them last night and it starts like a dream.
ricks450
12-02-2006, 11:24 AM
That's what im talking about. No im just playing around. Glad i could help you man.Have fun ridden. RIDE RED!!!!!