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crack addict

1566 Views 10 Replies 6 Participants Last post by  UngaWunga
I had taken the seat off my 350 to make some other work easier a little bit ago. Last night I found some cracks in the frame I had not seen before. The upper frame rails are cracked on both sides halfway between the shock mounts and frame rail loops. Each crack is about 1" long. There is also a couple of smaller cracks on the inside of the frame rails at the shock mount itself.
I'd like to think it was the byproduct of scary fast lap times but can only chalk it up to stress from being on the track. I've got to check for this stuff more often. It sure would have stunk to find out after something broke
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After the first season I was pulling this thing up the basement stairs and the small scrape over the edge of the bulkhead caused the water filled lower frame rail to start dripping. a poke with punch caused all the water to gush out. Talk about a sick feeling in the pit of your stomach. Welded up the rust hole and haven't seen any more problems there.
lol... cheap japanses crap!

I think I broke Doug Donelan's RD350 frame when i borrowed his bike up at Mosport 3-4 years ago. Second to last corner, got one helluva headshake. Gave him his bike back, told him it handled like shit. Might've been because I broke it... Broke on the downtube near the motor mount.

You can break the RD350 frames if you use the top rear motor mount. They do handle well, but it would be neat to measure the amount of stress that the tubes are put through.
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