Another Long term project Tigcraft supermono

[turkeyuk]

 gotta start somewhere, thought it would best be the frame considering there isnt much else to the bike!

everything else has been cleaned vapour blasted and serviced ready for rebuilding.

needs wheels and a few bits powdercoating and tank & fairing spraying.

also looking for a 1989 shape Honda RS250 race bike seat unit if anybody knows of one available?

progress will be slow amongst the xbr cafe racer & xbr beach racer im also building!

[guest564]

That looks quite different from mne, the chassis rails are flat sided and the swingarm mount is fabricated rather than being a CNC machined part. Have you looked at the chain clearance past the swinging arm pivot? it was a real problem on the early bikes. On mine the headstock had also warped when it was welded.

[guest833]

I like the way it takes pride of place on the dining room table!

You've got her trained mate!!

Or was she asleep?

[guest146]

Thats some strong frame. Lets see the complete frame please

Ken

[guest7]

...On mine the headstock had also warped when it was welded.

did anyone see the episode of 'Megafactories' on the Rolls Royce plant the other night? To stop the alumium roof panel from distorting during welding they use two welders, one on each side, who start at exactly the same time and go at exactly the same speed. Apparently only 6 blokes out of the whole plant's workforce can do this accurately enough. there's no pressure though, it's only virtually the last weld on the all-aluminium chassis after about two million hours of welding on hundreds of joints...  I'm sure they'd understand if you got it wrong

GC

[turkeyuk]

Rhinoman
there is some evidence of chain catching the lower cross brace at some stage, laterly it had a rubber guide, im going to fit some ptfe blocks to save the ally.

John,
the missus has since made me put some placemats underneath it  

Ken
more pics of the rolling chassis coming soon

Graham
i havent noticed any warping of the headstock but will take some measurements and angles now youve mentioned it, cheers

[guest564]

I would think that if the headstock was warped it would have been sorted out many years ago. You can check it by removing the bearing cups and measuring the ID at different angles, mine was about 1mm out.
You may have less problems than me with the chain clearances, the first bikes were a little larger all round so it may not be qute so tight. THe problem can be alleviated by careful choice of sprocket sizes and fine tuning of ride height.

[turkeyuk]

yeah i think it was fine before i stripped it, the gearing looked spot on for clearance and it runs a skinny nsr400 swingarm, nonetheless will be keeping a close eye on it.