great, but let me ask you, if i change the ex cam to 1 teeth and half (klx 250 s cam mod (by marcelino) the bike with acr will just not start when hot, may i disable this acr coz they sad it wont start because of this kacr system? or may i move it back (i dont know how!!!) 3mm ? thanks!!!
I bought a klx 650 an os super hard to kick i open the top an the acr seems to be missing looks like it snapped off would that make it impossible tobstart or should it still start up?
A missing ACR will make it harder to start but it should not be impossible. The point at which you begin your kick will probably be much more important than before. You'll want to make sure that you start the kick at the point just after the valves have closed on the exhaust stroke. The kick will only take the engine through about one complete revolution, so starting it just after the exhaust valves close will take you through in intake stroke and past the ignition point. I have kicked my KLR with no KACR and 11:1 compression, but I weigh over 200 pounds. It wasn't easy; I put the KACR back!
Hi Mark, Well.... Originally the KLR650 was the KLR600. The KLR600 was 'kick only'; it had no electric starter. Back in the day, all large single cylinder bikes had a compression release to make kicking it over a bit easier. A lot of them were manual, where you had a decomp lever on the bike to engage the compression release. Kawasaki built an automatic compression release. When electric start was added to the bike the automatic compression release was kept, as it made the starter's job a bit easier. I imagine that if they had put a manual decomp on the bike they would have done away with it, but the auto was already a part of the design. Not much sense in doing away with it. So, in once sense the KACR is a hold-over from the original bike with it 's kick starter and in another sense it is there to make the starter motor's job easier. If they had done away with it they would have had to put in a more robust starter motor and perhaps had to up the size of the battery. Tom
Christopher Finch Hi Christopher, Yes, it can be removed by completely removing the large rivet that holds the KACR assembly to the end of the exhaust camshaft. It can either be drilled out or the upset head can be ground off. I removed mine by drilling the rivet out. Tom
Excellent! That thing was blowin' my mind.
No more mystery!
great, but let me ask you, if i change the ex cam to 1 teeth and half (klx 250 s cam mod (by marcelino) the bike with acr will just not start when hot, may i disable this acr coz they sad it wont start because of this kacr system? or may i move it back (i dont know how!!!) 3mm ?
thanks!!!
I bought a klx 650 an os super hard to kick i open the top an the acr seems to be missing looks like it snapped off would that make it impossible tobstart or should it still start up?
A missing ACR will make it harder to start but it should not be impossible. The point at which you begin your kick will probably be much more important than before. You'll want to make sure that you start the kick at the point just after the valves have closed on the exhaust stroke.
The kick will only take the engine through about one complete revolution, so starting it just after the exhaust valves close will take you through in intake stroke and past the ignition point.
I have kicked my KLR with no KACR and 11:1 compression, but I weigh over 200 pounds. It wasn't easy; I put the KACR back!
Why does the engine need to release compression at low RPMs?
Hi Mark,
Well....
Originally the KLR650 was the KLR600. The KLR600 was 'kick only'; it had no electric starter.
Back in the day, all large single cylinder bikes had a compression release to make kicking it over a bit easier. A lot of them were manual, where you had a decomp lever on the bike to engage the compression release. Kawasaki built an automatic compression release.
When electric start was added to the bike the automatic compression release was kept, as it made the starter's job a bit easier. I imagine that if they had put a manual decomp on the bike they would have done away with it, but the auto was already a part of the design. Not much sense in doing away with it.
So, in once sense the KACR is a hold-over from the original bike with it 's kick starter and in another sense it is there to make the starter motor's job easier.
If they had done away with it they would have had to put in a more robust starter motor and perhaps had to up the size of the battery.
Tom
Is there a way to remove kacr?
Christopher Finch
Hi Christopher,
Yes, it can be removed by completely removing the large rivet that holds the KACR assembly to the end of the exhaust camshaft. It can either be drilled out or the upset head can be ground off.
I removed mine by drilling the rivet out.
Tom
I'm thinking about removing mine, I do ride in the cold WV winters. Did you have any issues after you removed it? Mine is making a lot of noise.
But why?????