neandethal Posted February 28, 2021 Report Share Posted February 28, 2021 Hi, I recently bought a Montesa 200 frame for a project and now that i look at it closely i am not sure if one of the downtubes is bent or it is meant to have a kink in it to allow exhaust routing or similar, its the right hand tube, Could any with more knowledge offer some advice, cheers Ian Quote Link to comment Share on other sites More sharing options...
dabber Posted February 28, 2021 Report Share Posted February 28, 2021 That’s bent. The exhaust exits centrally so kink shouldn’t be there. Quote Link to comment Share on other sites More sharing options...
nh014 Posted March 1, 2021 Report Share Posted March 1, 2021 Definitely bent. Quote Link to comment Share on other sites More sharing options...
teamferret Posted March 1, 2021 Report Share Posted March 1, 2021 Put a trolley jack in between the two downtubes, heat up the bent one and it will straighten quite easily. To check if the frame is out of line set on a stand and use a spirit level to get the swinging arm arm spindle level, then check that the forks are vertical. My gut feel is that it will be ok. Quote Link to comment Share on other sites More sharing options...
neandethal Posted March 2, 2021 Author Report Share Posted March 2, 2021 Thanks for the replies, as im going to fit a Ducati 160 motor i will just cut off above the bent and weld in new tubes to suit engine, many thanks Quote Link to comment Share on other sites More sharing options...
Bloomfield Posted December 27, 2021 Report Share Posted December 27, 2021 Hi, I just saw this. Did you get any further with this project? I too have most of an extra Ducati 160 and thought of building a trials bike with it but the sump would dictate mounting the engine quite high. I'm curious to see what you've come up with. Cheers Quote Link to comment Share on other sites More sharing options...
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