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Old 11-23-2014, 05:07 PM   #1
aklein318 OP
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Oddometer: 5
cylinder repair questions

Okay so I picked up a 2001 klx300. Ice had a drz400 supermoto, when I was single, and though I'd lime another SuMo, I wanna try the DS route.

So I get the bike... It had a sleeved 351 cylinder, and a new, used head, as it had broke the cam chain, and tagged a valve. Anyways, it started pretty easy but didnt FEEL like it had lot of compression. Anyways I got to replace the ACCT with a manual one from Kreiger, and pull out a unit with about 3/8" of weld bead clobbered up on the end, as if to make it longer to account for a stretched chain...

Time for tear down.

I find a stock size 78mm sleeved cylinder, worn valves, and a nice gouge down the bore

Now I'd LIKE to put a bill blue kit on it, but finances are a point of consideration, and also, I'd LIKE a plated bore. Question is-

Can you plate a steel sleeved cylinder bore? Or... Could I bore the sleeve 2mm over or would it just be too thin?

Everyone likes pics too, so here-



Ohh and this shit. The cams were not timed properly. Supposed to be 32 pins IN to EX mark

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Old 11-23-2014, 05:11 PM   #2
aklein318 OP
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And... The Drz I built was started the exact SAME way. Go to install a MCCT pull out a 'modified' tensioner.

Pics or GTFO???? well here


Started/done
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Old 11-23-2014, 06:27 PM   #3
markk53
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I've got a $36 fix for the cam chain tensioner, plus shipping for wherever you are. Looks like this:



PM if interested.

Also contact Bill Blue at bandbcyclerestoration.com/
he does the 351 kit, may have an overbore piston available
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Ever get lost? You know, that good kind of lost - come to a dirt road intersection and you have no idea where you are or which way to turn? I like when that happens!

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95 KLX650C w/Vulcan piston bigbore, Now an 09 KLX250S, selling my 90 Zephyr 550
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Old 11-23-2014, 07:15 PM   #4
aklein318 OP
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Yeah, that's the exact one I've got. Kreiger. Nice piece. The cylinder is NOT a big bore sleeved cylinder, but stock bore size. Yeah I'd like to go bigger but if there was an option for a .020 over piston I'd bore this one and call it a day. You think bill blue already has some custom .020 over pistons for the 78mm bore? I know he does for his BB kits
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Old 11-23-2014, 07:39 PM   #5
aklein318 OP
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Cool2

Since everyone likes pics, although completely off topic, here's some stuff I've been powder coating. Copper vein, no clear. The clear is what makes it look like it has the veins, but I like the flat look without it.






Here's the combustion chamber, kinda cleaned up a bit. It needs new seats for the intake valves, so I'll probably go with +1 kibble white pieces. If money were no object... Ferrea 5 angle. A man can dream
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Old 11-24-2014, 07:51 AM   #6
Kawidad
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Quote:
Originally Posted by aklein318 View Post
Okay so I picked up a 2001 klx300. Ice had a drz400 supermoto, when I was single, and though I'd lime another SuMo, I wanna try the DS route.

So I get the bike... It had a sleeved 351 cylinder, and a new, used head, as it had broke the cam chain, and tagged a valve. Anyways, it started pretty easy but didnt FEEL like it had lot of compression. Anyways I got to replace the ACCT with a manual one from Kreiger, and pull out a unit with about 3/8" of weld bead clobbered up on the end, as if to make it longer to account for a stretched chain...

Time for tear down.

I find a stock size 78mm sleeved cylinder, worn valves, and a nice gouge down the bore

Now I'd LIKE to put a bill blue kit on it, but finances are a point of consideration, and also, I'd LIKE a plated bore. Question is-

Can you plate a steel sleeved cylinder bore? Or... Could I bore the sleeve 2mm over or would it just be too thin?

Everyone likes pics too, so here-

Ohh and this shit. The cams were not timed properly. Supposed to be 32 pins IN to EX mark
The stock barrel should be nikisil and not sleeved, so somebody's been messing around in there. (Duh) Anyway, since somebody sleeved it the quality of that job is questionable in light of what you've already found, so I would take it or send it to a specialist and get their expert opinion before deciding. The BB kit would be THE way to go, but I understand the money concerns. From what I've read you could call him and see what he has to say about it.

As to the cam timing. Their is some tribal wisdom about changing the exhaust cam by one tooth to make it easier to start. You can look it up. I never did it and can't remember the exact details, so I don't think I'd sweat that one too much.

And, yes, we DO like pictures.

Keep up posted.
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Old 11-24-2014, 09:33 AM   #7
markk53
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Quote:
Originally Posted by aklein318 View Post
Yeah, that's the exact one I've got. Kreiger. Nice piece. The cylinder is NOT a big bore sleeved cylinder, but stock bore size. Yeah I'd like to go bigger but if there was an option for a .020 over piston I'd bore this one and call it a day. You think bill blue already has some custom .020 over pistons for the 78mm bore? I know he does for his BB kits

I musta been in the ozone when I read what you wrote... If you are working with the stock 300 cylinder see what it takes if you could use a BB 330 (or whatever) cc piston. Take a look at the liner thickness and see if it can take the overbore and still have decent thickness (1-2mm or so). Other option is to approach Wiseco to see if they have one that will work. My bet is someone hosed up the nickasil and put in a sleeve instead of replating. If you are fortunate you can bore it out to fit the 330 (or whatever size) BB piston.
__________________
Ever get lost? You know, that good kind of lost - come to a dirt road intersection and you have no idea where you are or which way to turn? I like when that happens!

Mark - klx678
95 KLX650C w/Vulcan piston bigbore, Now an 09 KLX250S, selling my 90 Zephyr 550
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