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Old 06-16-2013, 05:40 AM   #7966
mcma111
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dgman,

Isn't your motor the one with intermittent low compression? Better pull the valves to check the seats.
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Old 06-16-2013, 01:10 PM   #7967
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It all comes down to how much money you have to play with.
You could just hone and rering for $50 but a bore and high compression make it so much better.
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Old 06-16-2013, 06:19 PM   #7968
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Quote:
Originally Posted by mcma111 View Post
Ship it to me and I'll put it together for you.

Might have to do that, What do you do with them? I have two motors complete. One is blown slap up I think just swaped the orginal back in the bike and its got about 16500 on it with a chain slap sound comming out of it, also the sprocket seems to have alot of play in it (new sprocket) on the shaft, I want to do everything all at one time Valves piston thinking big compresson, maby cam up grade and any other improvements that would be good in the long run cam chain bearings ect ect
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Old 06-16-2013, 07:34 PM   #7969
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Might have to do that, What do you do with them?

Take the best of the two motors, install a Wiseco 101mm or 102mm piston, valve job and a Mega Cycle cam.

Back in the day I had a Venolia piston, a Carrillo rod and the Mega Cycle cam 'n rockers.
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BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 06-16-2013, 08:59 PM   #7970
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Originally Posted by mcma111 View Post
Take the best of the two motors, install a Wiseco 101mm or 102mm piston, valve job and a Mega Cycle cam.

Back in the day I had a Venolia piston, a Carrillo rod and the Mega Cycle cam 'n rockers.
Did you have to do the shortened guides and heavier springs with that cam?
Anyway I am not sure if I need anymore power. I could easily dump my wife off the back with a flick of the wrist right now. There is no spool up for power. It hits instantly and pulls hard. I cant see a damn thing behind me because the mirrors blur.
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Old 06-16-2013, 09:04 PM   #7971
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The base cam from Mega Cycle is a drop in cam. No shorting of the guides necessary. I have this cam in my XR600.
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Old 06-17-2013, 02:10 AM   #7972
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Ok i need your help! Just got an xl600r engine for my xl600rm bike with an engine that needs way too much work for my budget/timeframe.
So, what would be the easiest way to make this engine work, including the lights and everything? I do want to keep the wiring harness as original al possible, because i plan on rebuilding my original rm engine.
Homerb told me about a few differences allready, but i'm still confused.
I also read about swapping over the stators to make things easier? What else, do i really need the cdi from the xl600r too? Wiring changes?
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Old 06-17-2013, 05:48 AM   #7973
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Hi Tom, just had a look at my parts diagrams and I can confirm that the XL/XR600R and XL600RMG share no electrical components, according to their part numbers, anyway. Thats not to say the coils for example wont interchange.
I have confirmed that the kick start XL/XR600R CDI is powered by alternating current (AC) from the stator, generated when kicking.
The electric start bikes, 600RMG, NX650, XR650L CDIs are powered by direct current (DC) I assumed from the battery, until I kick started my RMG with no battery connected. Confusing I know.
As the NX650 and XR650L have no kickstarter, I wonder if they could be clutch started without a battery?
If so, I assume the DC is coming from the stator as AC, through the rectifier and into DC for the CDI. Im just guessing here. The wiring diagram I sent you may explain it. I can never read the bloody things myself.
Short answer is I think the XL600R motor will need a XL/XR CDI and possibly regulator/rectifier as well. Im assuming the XL600R motor has the stator in it.
Good luck.
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Old 06-17-2013, 06:28 AM   #7974
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Without a wiring diagram to consult, or a parts breakdown I will have to guess. I did look at one for an xr650L however since that is all I have available to me. I think that the main difference between the two is the stator. There is only the stator and pulse coil for electrical on the engine. I did check a parts microfiche and found that the pulse coil is the same on a 650L as on a XR600, as is the ignition coil. The difference in the stator would likely be the ignition AC coil used on the magneto bike.

I suspect you could swap stators and drop it in using your existing wiring harness. That would be the simplest way to swap engines between the two with fewest modifications to the bike.

If the stators don't swap for some reason, I would be inclined to make a temporary harness to utilize the magneto style ignition. That would necessitate a matching A/C CDI unit too. That way there would be no butchering of the original harness.

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Old 06-17-2013, 08:32 AM   #7975
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Gasket question on these old mules... I replaced my stator this weekend with a Ricky Stator... Spent nearly an hour cleaning up the "painted" gasket surface on the stator cover, and buttoned everything up. After I got it running again, I ran down to the gas station to top the tank off with fresh gas, and rode back home. Maybe 1/2 a mile at the most. Now I'm noticing a dribble of oil on the ground from the stator cover, and I think I've traced it to the rear of the stator, near the countershaft sprocket and chain. It's certainly not chain oil...

So, I'll probably need to remove the cover again, and I'm wondering... Should I use a bead of RTV on the stator cover side of the gasket? The machined side of the cases looks great...
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Old 06-17-2013, 09:26 AM   #7976
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Did you use a Honda OE gasket? I have had less than stellar results with anything less. Also, did you put a dab of sealant (Hondabond preferred) around the grommet for the wires?

I had a slight leak on my stator cover after I reused a Honda gasket that looked intact, after a few heating cycles it healed up on it's own as I ordered another gasket. At least now I have a spare.
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Old 06-17-2013, 09:40 AM   #7977
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BMW's
58 R26
79 R100s
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87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 06-17-2013, 09:46 AM   #7978
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Originally Posted by davek181 View Post
Did you use a Honda OE gasket? I have had less than stellar results with anything less. Also, did you put a dab of sealant (Hondabond preferred) around the grommet for the wires?

I had a slight leak on my stator cover after I reused a Honda gasket that looked intact, after a few heating cycles it healed up on it's own as I ordered another gasket. At least now I have a spare.
Yeah, Honda OEM.

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Noted. That's probably EXACTLY where it's coming from... whoops.
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Old 06-18-2013, 08:54 AM   #7979
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Should I put a small film on the cover side of the gasket as well, or just around the wires?
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Old 06-18-2013, 08:55 AM   #7980
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Just the grommet and where the gasket goes over the grommet. The gasket goes on dry.
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BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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