xt600e starting problem

[Steve H]

hi guys,
my compression tester arrived from ebay today, and maybe the single spark was a red herring!  compression reads 35 psi, 1200 psi less than it should.
looks like the heads coming off.

Since there is little or no compression I would expect it to spin very quickly on the starter, is this the case ?

[Richard]

And please tell me

us that you disconnected the automatic decompressor first !

[guest1518]

120psi, not 1200.
no, I didn't disconnect the automatic decompressor first.  I didn't know it had one, and I can't see it, and I can't find a reference to it in the workshop manual. I thought that it was only available on a kick start model. 
If it does have one I need someone to tell me how to disconnect it.
Thanks for taking an interest in my build, it's much appreciated.

[Steve H]

The 660 engines appear have an automatic decompressor built into the camshaft sprocket. The 600 Grizzly(Quad) seems to have a similar device but I cant see any reference to anything like it on the XT600E engines.

[Richard]

In which case I may be mistaken - My XT600 (kick and electric) has one and I assumed, perhaps wrongly, that the 660 engine fitted to my Skorpion would also have one.

Richard

[andy230]

I think the 5v motor does have an auto decompressor, but in this case we are referring to the xt600e.

I do not know, but I would think that the 600 motor would also require one. Tho I also know that when removed, the electric leg will still get it over compression.

Tho if it only makes 35psi on compression,  it wouldn't matter if it had one or not!

Cheers

A

[Steve H]

Are we discussing the kick-start decompressor here , in which case it wont effect the action of the electric start.

[guest1518]

Hi guys,  thanks to all who have tried to help me.  I've finally got my bike running, I fitted some new rings, which it didn't need, did the valves and seats, which it did need.  Still wouldn't start, so I bit the bullet and bought a new TCI

[guest1518]

I  had it running before the delivery guy was at the end of the road.