rebuild, but not a honda

100hp honda · Post by **100hp honda** » May 19th, 2009, 8:28 pm

in spare time i figured i'd do a rebuild on this and freshen everything up, probly do some porting to make it go faster

. it will be a cast piston, that should bring a smile to bob

dannygraves · Post by **dannygraves** » May 20th, 2009, 9:25 am

very cool katoom, bring her out to dumont one of these days!

100hp honda · Post by **100hp honda** » May 20th, 2009, 8:12 pm

danny boy, if you run across a 440 you should pick it up. the magazines say they screem like a 250 but with 25 extra HP (89mm bore x 70mm stroke

). i swore i wouldnt buy another ktm, but if i can find a 440 for cheap i just might snag it.

100hp honda · Post by **100hp honda** » May 20th, 2009, 10:09 pm

maybe bob wont be so happy. i just read the ktm manual and apparently the ktm piston is forged. who would of thought

. sorry bob

dannygraves · Post by **dannygraves** » May 21st, 2009, 7:58 am

yota · Post by **yota** » May 24th, 2009, 9:17 am

some of the older ktm's, like maicos used mahle pistons. none better.
I've reused mahle's over and over and over and over .

yota · Post by **yota** » May 24th, 2009, 9:18 am

some of the older ktm's, like maicos used mahle pistons. none better.
I've reused mahle's over and over and over and over .

100hp honda · Post by **100hp honda** » May 24th, 2009, 8:37 pm

im not sure what piston it is. its no good now, i had to use a dremel to remove the wrist pin

CR500R7 · Post by **CR500R7** » May 24th, 2009, 10:02 pm

Please explain.

100hp honda · Post by **100hp honda** » May 25th, 2009, 9:57 am

i didnt have to destroy the piston but heres what i had to do: the wrist pin started to waller out in the wrist pin bore of the piston and created a "lip" between the wristpin and circlips, in order for the pin to slide out i had to grind the lip down. with a nikisil cylinder im sure its possible to re-plate the cylinder back to spec and re-use the piston if everything looks fine, unfortunatly mine is beyond help. its no big deal, ill get a new piston.

CR500R7 · Post by **CR500R7** » May 26th, 2009, 3:12 am

Thanks you scared me for a second, had imagines of lunatic with dremel trying to remove wrist pin.

It makes sense now, its all good.

dannygraves · Post by **dannygraves** » May 26th, 2009, 7:37 am

CR500R7 wrote:Thanks you scared me for a second, had imagines of lunatic with dremel trying to remove wrist pin.
It makes sense now, its all good.

LOL, I thought the same thing at first!

Post by **AlisoBob** » May 26th, 2009, 8:08 am

100hp honda wrote:maybe bob wont be so happy. i just read the ktm manual and apparently the ktm piston is forged. who would of thought . sorry bob

Yea.. .well.... the pistons in my DuraMax survive under 100% throttle all the time under my size 13 @33psi boost.. and their cast.

Its all good.....

JBaze · Post by **JBaze** » May 26th, 2009, 8:23 am

AlisoBob wrote:
100hp honda wrote:maybe bob wont be so happy. i just read the ktm manual and apparently the ktm piston is forged. who would of thought . sorry bob
Yea.. .well.... the pistons in my DuraMax survive under 100% throttle all the time under my size 13 @33psi boost.. and their cast.

Its all good.....

Size 13! Pussy! My Cummins holds up to hammering under my size 16! Yeah and I'm not affraid to measure either

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » May 26th, 2009, 8:30 am

Dude i've got a hard time finding size 13 boots/shoes here, how the heck do you find 16's?

JBaze · Post by **JBaze** » May 26th, 2009, 8:53 am

When I was a kid it was hard to find any but now with computers, I can find em all day long. The hard ones to find are riding boots. Right now I use a set of old Hi-Points black and chrome.

100hp honda · Post by **100hp honda** » May 26th, 2009, 9:21 am

AlisoBob wrote: Yea.. .well.... the pistons in my DuraMax survive under 100% throttle all the time under my size 13 @33psi boost.. and their cast.

Its all good.....

book calls for .0021" - .0025" piston clearance. firing it up and hammer down probly aint going to work for the break-in procedure on this one

Post by **AlisoBob** » May 26th, 2009, 9:44 am

JBaze wrote:

Size 13!.... Pussy!

I aint talkin' boot size.....

JBaze · Post by **JBaze** » May 26th, 2009, 11:33 am

AlisoBob wrote:
JBaze wrote:

Size 13!.... Pussy!
I aint talkin' boot size.....

Keep dreamin, you know what women say about the size of a guys foot right? It be fact!

CR500R7 · Post by **CR500R7** » May 28th, 2009, 2:22 am

Size does MATTER , to who I don't know.

JBaze · Post by **JBaze** » May 28th, 2009, 7:12 am

CR500R7 wrote:Size does MATTER , to who I don't know.

Seems like mostly to guys!

dannygraves · Post by **dannygraves** » May 28th, 2009, 8:16 am

JBaze wrote:
CR500R7 wrote:Size does MATTER , to who I don't know.

Seems like mostly to guys!

100hp honda · Post by **100hp honda** » June 4th, 2009, 5:19 pm

got my magnetabzieher today

. now i can continue the tear down

CR500R7 · Post by **CR500R7** » June 5th, 2009, 7:56 am

Run that by me again.

100hp honda · Post by **100hp honda** » June 5th, 2009, 6:29 pm

i think it was some german word on the box. i assume it means flywheel puller

BannedCR500Riders.com

rebuild, but not a honda

rebuild, but not a honda