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Old 10-20-2011, 08:10 PM   #61
ktmklx
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No decompression device shown in the parts catalog. I have not checked valve clearance on mine yet, so can't speak from experience.
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Old 10-21-2011, 05:55 AM   #62
sanjoh
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Quote:
Originally Posted by DRjoe View Post
Do these motors use auto decomps on the camshafts?
No
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Old 10-29-2011, 05:31 PM   #63
Krasniewski OP
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Alrighty - sorry for the delay - Went out and did over 3k on the other bike last week up through CA, OR, and WA.

I couldn't check the spark timing earlier b/c the timing gun I have (borrowed) needs a spark plug wire. It doesn't work on my bike b/c there really isn't one, as the coil is a stick type to which the plug is directly connected. The wires are numbered, as are the plug holes, so no way to fuck that up, though I did switch them out just for kicks once (w/o success).

sanjoh is right - no auto decomp's.

Anyway, like I said, just came home - garage is a mess - I deploy soon and spent a lot on vacations these last 2 weeks, especially since the BMW broke down on the road and needed a fuel pump, so financially, this project won't be getting much else anytime soon. I'll mess with it later on, perhaps.
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Old 11-24-2011, 12:23 PM   #64
tex_downey
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Quote:
Originally Posted by Krasniewski View Post
Great to hear advice - thank you. Very clear and concise.

I haven't done a leak down test, nor have I checked the valve clearance - I'll look into those.

As to the other specifics - I didn't move the cams at all. I did check them though, and all the marks line up exactly.

The compression gauge is brand new - cost around $40. Definitely not top of the line, and unproven. I initially did the checks with throttles closed, which yielded about 60 PSI - I rechecked with throttles open and got 70 after I noticed that detail in the manual.

Anyway, thanks again.

UPDATE: I don't (yet) have the specific leak down gauge, but interestingly enough, if the motor is turned by hand with the compression gauge hooked up, NO PRESSURE registers on the gauge for either cylinder. I don't know if it's b/c the pressure isn't building up at all, or the check valve is just too strong. Any thoughts???

Id say trust it. I know its no fun to hear. but hey this was a few months ago anything new?
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Old 11-24-2011, 12:34 PM   #65
Krasniewski OP
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Originally Posted by tex_downey View Post
Id say trust it. I know its no fun to hear. but hey this was a few months ago anything new?
The only thing I've done lately is checked the computer for codes - but no help there.

I've been super swamped with work, and I'm deploying in less than a month, so this will probably sit for a long time unless someone wants to take the reigns.

Thinking about it recently though, I think the rings are the culprit. I put it all back together already, but I think I need to pull it all back apart. The rings are basically fused in place - not loose as they should be. I was going to pull them off, but I couldn't even do that. They slid back into the cylinder with no compression at all. I don't know what I was thinking earlier - I should have looked into that more, but I guess I'm a moron, so I'll deal with it later.

New rings, and gaskets, and I think that'll do the trick.
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Old 11-25-2011, 02:37 AM   #66
DRjoe
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Quote:
Originally Posted by Krasniewski View Post

Thinking about it recently though, I think the rings are the culprit. I put it all back together already, but I think I need to pull it all back apart. The rings are basically fused in place - not loose as they should be. I was going to pull them off, but I couldn't even do that. They slid back into the cylinder with no compression at all. I don't know what I was thinking earlier - I should have looked into that more, but I guess I'm a moron, so I'll deal with it later.

New rings, and gaskets, and I think that'll do the trick.
That'll do it

You'll be back on the road in no time now you've found the problem
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Old 12-03-2011, 09:06 PM   #67
Krasniewski OP
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Well, I got her to start today after new pistons/rings...



More to come.
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Old 12-04-2011, 02:04 PM   #68
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Well - we're back in business! Looks like the piston rings seized into place and the lack of suction wasn't getting the air/fuel mixture into the cylinder, then not compressing. She's running well now... finally.

Thanks to all for the input and help over the last months.



The new intake makes her run better than before, though the fueling above 8k rpm still isn't perfect. A Dyno would fix that, but she honestly doesn't need it and I'm pretty much done with her now as I'm outta time!
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Old 12-04-2011, 02:31 PM   #69
Ridin'nFishin
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[QUOTE=Krasniewski:

The new intake makes her run better than before, though the fueling above 8k rpm still isn't perfect.

[/QUOTE]

Could you show us some pictures of your intake with air filters?

Thanks
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Old 12-04-2011, 03:23 PM   #70
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Quote:
Originally Posted by Multisurface Rider View Post
Could you show us some pictures of your intake with air filters?

Thanks

Well, I'll show you what I have...

Taken from page 2, you have a pic of the spine and throttle bodies - one has a JB Weld stick putty to close the gap, (which is far from optimal as it doesn't allow for flex and vibration absorbtion)...





...and the other has a 90 degree PVC bend wrapped in a long strip of rubber, so keep it air/water tight.



Sorry - didn't take pics of the finished product.

Off the back I welded on a tube, and put a foam filter on the end. Ideally, it would be enclosed in an airbox so the back wheel wouldn't cover it in dirt.

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Old 12-04-2011, 05:36 PM   #71
dentvet
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well, we kinda let you down bud, sorry.

Looking back in hindsight, its obvious that the rings are stuck in the picture you posted. We should have caught that.

Glad its sorted now, be safe overseas and thanks!

Quote:
Originally Posted by Krasniewski View Post
Discuss:





Quote:
Originally Posted by Krasniewski View Post
Well - we're back in business! Looks like the piston rings seized into place and the lack of suction wasn't getting the air/fuel mixture into the cylinder, then not compressing. She's running well now... finally.

Thanks to all for the input and help over the last months.



The new intake makes her run better than before, though the fueling above 8k rpm still isn't perfect. A Dyno would fix that, but she honestly doesn't need it and I'm pretty much done with her now as I'm outta time!
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Old 12-04-2011, 05:41 PM   #72
Krasniewski OP
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Originally Posted by dentvet View Post
well, we kinda let you down bud, sorry.
Not at all, man. It's so hard to diagnose something from a picture - hard to have any expectations really. The rings didn't look right to me at all - I should have pointed it out.

On the contrary - the only reason this actually got started, let alone finished, is thanks to the interest online.

Good times.

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Old 12-04-2011, 09:50 PM   #73
tex_downey
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glad you got it.

and the pics are a dead give away. opps.
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Old 08-01-2012, 09:34 PM   #74
JAFO
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Any news on this? How's she doin?
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Old 08-03-2012, 06:07 PM   #75
Krasniewski OP
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Funny you should ask - just flew off the USS Abe Lincoln today - holed up in NM for the night - should get home tomorrow! So long as she fires up again, I'll keep working on her - I'll post updates as they come.



I haven't been home since December, so I've got lots to catch up on!
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