Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)

HELP w assembly

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81cr450:
DoldGuy I can see the pinsinault head gasket I got being a problem as the copper had some trash in it when they pressed it right where the fire ring would be , but cometic will let you special order bore size specific so I think thats covered. Not going to go beyond pump gas compression either. & .080 closer to the stud would distort more

Like you said on your ideal build 88x88 Motorrad, why arent you thinking bigger.It seems like most tend to stay as close to stock size, like bigger is bad. I can see thin, hot spots as being a legitimate thought but... When I ordered the piston I actually ordered a 91 & they said no cant go bigger than 90 without a sleeve, so I realize its gotta be borderline just wondering where the reliability becomes an issue I guess.

As far as the problem that didnt get fixed, the bridges werent cracked I just wanted them beefed up which didnt happen. As you can see

Motorrad:
I actually am thinking 90X88 now...

kawiscooter:
not related, but what the heck is that white critter in the first picture? Looks like a chiuhuha crossed with a cat!??

81cr450:
Shpynx cat, named Peaches O'chit. If you like cats they're the chit, no hair to gag on when you pet them & they act more like dogs.

81cr450:
Finally moving forward again. With a little time I built a jig to cut my dome ,not pretty but I didnt have a jig to copy & just used what I had. Took some time to dial in but I'm underway again. Hoping to get it done this weekend. CC'd it at 47cc, with the 550 big bore I hope it comes in at 155psi static, math says it should be close. The stock head was at 85.5 mm bore, you'd think the factory could get closer.
 

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