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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Manual decomp... /cgi-bin/YaBB.pl?num=1297539796 Message started by Serowbot on 02/12/11 at 11:43:16 |
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Title: Manual decomp... Post by Serowbot on 02/12/11 at 11:43:16 I've been thinkin' 'bout it... Something like a carb tickle lever... How long do you think I'd have to hold it open?... :-?... Do you think it might kick back at your finger when you let go?... :-?... |
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Title: Re: Manual decomp... Post by MotoBuddha on 02/12/11 at 12:43:02 There were bikes with what looked like a stubby clutch lever that actuated the decompression. I know on the Yamaha XS650 it also activated the starter. You only need to open the decompression long enough for the engine to start turning -- so like a half second. The Ryca conversion has a manual decompression lever that recycles the shift lever. It's mounted out on the front of the frame with a rod running up to the lever on the engine. But that wouldn't work for someone keeping the stock controls. But I was thinking someone could make what looks like a small suicide clutch shift lever attached directly to the arm of the decompression mechanism. A chromed rod with a ball on the end could curve out around the tank and be easy to reach. |
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Title: Re: Manual decomp... Post by justin_o_guy2 on 02/13/11 at 09:43:55 A shifter off an old 3 speed bicycle mite just do it. |
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Title: Re: Manual decomp... Post by 12Bravo on 02/13/11 at 11:37:36 I can't remember the exact model but Suzuki had a 500cc single cylinder enduro with a manual decomp that looked like the old choke switches on the Yamaha XJ series bikes and was mounted on the handle bar. That would probably work on the Savage/S40 |
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Title: Re: Manual decomp... Post by MotoBuddha on 02/13/11 at 11:44:00 The problem with handlebar mounted decompression levers from other bikes is the old 1" vs. 3/4" bar thing. |
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Title: Re: Manual decomp... Post by justin_o_guy2 on 02/13/11 at 12:09:57 yea, its a problem, but it shoudnt be insurmountable. |
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Title: Re: Manual decomp... Post by MotoBuddha on 02/13/11 at 12:12:24 A sawed-off second Savage clutch lever should do the trick. I imagine there are several places it could be mounted. |
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Title: Re: Manual decomp... Post by Serowbot on 02/13/11 at 12:54:32 I'm just thinkin' of adding some kind of an extension directly on to the decomp lever at the head... I think it would be cool to reach down and flick it, to start 'er up... Maybe tack weld the end of a spoon to it... :-?... Stylin'!... Uh huh... ;D... It was Jonnyb's suicide shifter that got me goin' on it... |
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Title: Re: Manual decomp... Post by caseyLA on 02/13/11 at 17:44:50 Combining a manual decomp with the starter button would be rad. Can't wait to see the first one. |
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Title: Re: Manual decomp... Post by AKinengland on 02/14/11 at 05:28:44 My old BSA's had a manual decomp it was a trigger unnder the twist grip which pulled a cable and slightley lifted one of the valves, I was looking at this with a view to the savage and it would be a relativley easy conversion although you also had to ajust the timing maunualy when kick starting get this wrong and the best you could expect was being launched over the bars and at worst damage to your ankle which I still feel in damp weather |
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Title: Re: Manual decomp... Post by carlostheobscure on 02/15/11 at 09:40:39 What is the benefit/purpose of a manual decomp lever (not meant to be straight line for the comedians in the forum)? |
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Title: Re: Manual decomp... Post by Serowbot on 02/15/11 at 10:37:53 0103100E0D11160A070D001101171007620 wrote:
Practically none... :-?... (...and I'm keeping a straight face while typing this)... |
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Title: Re: Manual decomp... Post by verslagen1 on 02/15/11 at 12:02:34 2D2F3C22213D3A262B212C3D2D3B3C2B4E0 wrote:
Benefit would reduction in weight and complexity. Also, you'd be able to push start or rolling start anytime. Unfortunately, combining the decomp lever with the start button creates a difficulty, you have to squeeze the decomp button before pressing the start button and release the decomp lever while holding the start button. Plus, unless you remove the clutch safety, you gotta hold the clutch in. So if all safeties are to remain in place, the best place for the decomp lever and start button is for a right handed operation. Most savages start w/o twisting the throttle so a frame mount would be acceptable. Squeeze the decomp lever with the index and middle finger, squeeze the start button with the ring finger, release the decomp lever, holding the start button till it starts. |
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Title: Re: Manual decomp... Post by greenmonster on 02/15/11 at 13:42:13 This may be a stupid question... Why do you need to release the decomp lever while still holding the start button? |
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Title: Re: Manual decomp... Post by verslagen1 on 02/15/11 at 13:58:00 273225252E2D2F2E33342532400 wrote:
no compression no run |
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Title: Re: Manual decomp... Post by greenmonster on 02/15/11 at 15:40:11 I really need to sleep more. Yes, that was a stupid question. |
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Title: Re: Manual decomp... Post by Serowbot on 02/15/11 at 22:31:34 2A3F2828232022233E39283F4D0 wrote:
I liked it... :-?... |
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Title: Re: Manual decomp... Post by justin_o_guy2 on 02/15/11 at 22:42:58 It needs a compression release so as to allow the engine to get past the first compression cycle & allow the engine to get spinning before it comes up on compression again, after spinning thru the power, exhaust & intake strokes, getting the rotating mass up to speed, so that when it hits compression, it wont overload the starter & the gears it drives. If ya dont let go of the comp release, well,, The Rowboat covered that. |
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Title: Re: Manual decomp... Post by Boofer on 02/16/11 at 22:14:26 My daughter's TRX 300 ATV has a manual decomp release on top/front of motor. You just flip it open and it shuts upon cranking. The thing is, it's better to use with the kick starter on a cold engine when the battery fails. I only tried it once to see if it worked, but it might be easy to burn a finger if the engine is hot. Just sayin' |
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