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June 27th, 2017, 10:32 AM   #11
Joined: Oct 2016
From: Sweden

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I Ride:
I took the advice and removed the auto decomp(3 mounth ago),i dont feel any difference in the way to start it though .
Husaberg 600fe 1995.
I use manual decomp and by the fourth or the fifth kick I got one bit of the kick movement that feels like a mechanical stop cant pass it, totally stop.
The guy(heavy one Im a light guy) I bought the bike from said that the kickaxle was replaced, I think if you are trying to go through this dead end stop before it reach the footpeg by brutal force you could break the kickaxle or someting related .

Last edited by Mazzokie; June 27th, 2017 at 10:41 AM. Reason: misspelling
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June 27th, 2017, 02:20 PM   #12
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From: Escondido, Ca. USA

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I Ride: 2005 Fe450,2001 Fx470,1997 Fx600
The 600's up to 2000 have a helluvalot of compression. A friend that has a 99 600 used the stock decompression device and spring. He pretensioned the spring so that lever or device snapped back nicely to its resting position. He can kick start it while sitting on the bike. Taffmeisters sells a stronger spring which is not a bad idea too.

On my 97 I went to a KTM cam and used the newer 04-08 decomp and it will kick and e-start easily.

It came from the factory with the decomp spring incorrectly installed and I could never kick start it. Luckily it was an e-start model. The e-start models of that era came without the manual dompression release.
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June 28th, 2017, 11:25 AM   #13
Joined: Jan 2017
From: Sweden - Sjömarken

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I Ride: KTM250EXC-F, Yamaha FZS1000, Husaberg 650FSe
Since I have it apart now and waiting for a new kick lever return spring I carefully looked at the mechanics of the kick start auto decomp.

1. Kick lever resting position is approx 11 o'clock, kick lever more or less towards clutch cover.
2. The decomp cam on the kick start shaft starts to lift the decomp actuator at 12 o'clock (rest in cam) and starts valve lift approx half past 12..
3. The engagement pawl is released from it's locking cradle at about 1 o'clock (kick start shaft engages kick start gear).
4. The decomp cam disengages at about 4 o'clock.
5. The kick lever stops towards the foot rest at about 6 o'clock.
6. One comple "normal hard" kick gives two revs on the crank/one complete cycle.

I previously had my decomp slack adjusted to 2 +/- 1 mm at the decomp axle, according to the manual his was set at compression TDC.
When having this apart, I see that there's a small rest position for the decomp actuator on the kick shaft decomp cam just before the decomp engages. I adjusted the slack in this position instead, giving more slack at kick lever rest position (11 o'clock) and less total lift during decomp. I can still push the lever by hand but I can feel a bit more resistance. I think to much decomp lift maybe makes my bike hard to start since I have been through absolutely everything at least twice and tried different choke and idle jets.

In the first attached photo you can see the decomp actuator at the cam rest position before engagement. In the second photo the decomp is in total rest, kick lever rest position (also the shaft wont return further because the pawl locks towards a raised part of the cradle). Below the shaft you see the pawl lock cradle (pawl removed but it goes in the slot on the underside of the axle).

Now I just hope the new spring arrives before the weekend.
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Auto-decomp questions???-img_0651.jpg   Auto-decomp questions???-img_0652.jpg  
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