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Message started by wombat on 06/16/11 at 06:35:33

Title: handlebar compression release lever
Post by wombat on 06/16/11 at 06:35:33

Racing dirt bikes such as the Honda XR650R have a manual compression-release lever mounted on top of clutch lever. Very clever. Has anyone tried to fit one of these, or something like it, on a Savage or Ryca? One problem is that most dirt bikes have 7/8" bars while our's is 1".
Dave

Title: Re: handlebar compression release lever
Post by MotoBuddha on 06/16/11 at 07:06:51

If I remember correctly XS650 Yamahas had a decompression lever that was also the start button. But I could be having a senior moment.

Title: Re: handlebar compression release lever
Post by justin_o_guy2 on 06/16/11 at 07:20:18

Id want a bar mounted decomp If I had a kick start. The simplest, most elegant decomp Ive seen was a simple lever on the head. Cant remember who has it,,
The decomp is only needed for a split second, to make sure the starter can get the engines mass swingin so it could push thru compression & not overload the starter & its gears. If the piston is down & going into the exhaust stroke, the decomp isnt even needed,, but, its there, just in case its coming up on compression,

Title: Re: handlebar compression release lever
Post by wombat on 06/16/11 at 07:23:15

But how do you hold the clutch in and hold the compression release open both with your left hand at the same time?

Title: Re: handlebar compression release lever
Post by justin_o_guy2 on 06/16/11 at 07:27:30

You dont, you flip the lever to trap an exhaust valve partially open & when the cam opens the exhaust valves fully open it flops back,

Title: Re: handlebar compression release lever
Post by verslagen1 on 06/16/11 at 07:28:34


50484A454653270 wrote:
But how do you hold the clutch in and hold the compression release open both with your left hand at the same time?

You hold the clutch with three fingers and the decomp with the index.

Title: Re: handlebar compression release lever
Post by jdeluca on 06/16/11 at 21:10:08

Don't Savage's have an Auto-Decompression cable?  I remember seeing something resembling it in the 86-88 book...

Title: Re: handlebar compression release lever
Post by Serowbot on 06/16/11 at 22:44:07


66686960796F6D0C0 wrote:
Don't Savage's have an Auto-Decompression cable?  I remember seeing something resembling it in the 86-88 book...

;D... Yes they do...
Some of us old farts want manual everything...
I have no idea why,... but I find the idea of triggering it manually, appealing...
Control freak, I guess... :-?...

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