Seven Fifty cafe-racer. Tail tube and front fender.

Looks like time to post new Honda CB-750 Seven Fifty cafe-racer updates.

The first is front mudguard. I managed question with mudguard itself quite quickly. I have few old mudguards from old soviet motorcycles (good metal I must say) and between them I found one which fits perfectly after it was cut and slightly widened.  But the question of mounting was more difficult. The point is after I changed a front tire to 120/80-17 instead  of stock  120/70-17 one, the fender  mounting  points on fork  are right in the level with widest tire point, so there is a little room remained for mount itself.

After some thoughts I designed and made aluminum bracket ( from 3mm aluminum plate ) which aligned tightly to fork outer pipes. The fender itself could be mounted to it by four bolts.  I also used stock CB750 fender mounting nuts. That’s how all looks like:

Last weekend I spent to make a tail tube for Seven Fifty cafe-racer.  I have no any tube bender in my garage but I had intention to make tube which close to the very tail configuration, so tube bender  was useless anyway.  But I am good at workaround searching, so I decided to use the same method as in “Eight Ball” project. I spent a half of the day for preparation:  fixed vise tightly on workbench, readjusted bend template to current tail tube configuration, filled the tube with fine river sand and so on. I had only one piece of the suitable tube at hand so I had only one attempt.

After everything was ready I heated the tube with gasoline blowtorch and bent it in template fixed by vise. Not the easiest way to do so, and a couple of times I felt lack of another pair of hands but I did my best and made quite good tail tube.

Then I made a couple of frame inserts to join sub-frame and tail tube.  Here is a tail tube in process of cleaning:

And it is ready to be installed.

I also cut Seven Fifty sub-frame right after shock mounting point to lower the tail tubes profile. After some adjusting tail tube was ready to be installed on motorcycle. I still did not decide what exactly angle should be between sub-frame and tail tubes so I left some gap between tail tube and rear tubes of sub-frame triangle.

And of course, I shot general bike views. You may also see all updates from previous post on them.  I didn’t finish foot-pegs  yet, so I’ll write about them after they are completed.

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