SOHC.co.uk Forums > CB750
Bought me a money pit ?
florence:
I would cut the end off the pipe and put a universal silencer on the end. I've got one that is straight through but with baffle material around centre. Surprisingly quiet below 5000rpm.
Grewth:
--- Quote from: florence on August 08, 2025, 09:31:56 AM ---I would cut the end off the pipe and put a universal silencer on the end. I've got one that is straight through but with baffle material around centre. Surprisingly quiet below 5000rpm.
--- End quote ---
I'm already on that one.
Undid the weird little clamp thingy and pulled the rear section off yesterday, when I removed the rear wheel.
Note the high standard of engineering fixings used to mount the system, and the cunningly melted pillion footrest rubber.
I'm undecided whether to saw off the fat part, and mount a Chinese glass pack silencer, or to buy some perforated tube and make up my own glass pack.
Car exhaust tubing etc is as cheap as chips compared with anything intended for motorcycle use.
Of course it's more work for me, but I like to have something a little different to everyone else [ Guests cannot view attachments ]
florence:
I once made a two into one system for my CX500, using universal flexible exhaust pipe, a Y piece from a Talbot Horizon car and a rusty BSA Goldstar silencer. I took the bike for MOT at Honda Equipe. Very cheap solution and despite strange looks from the tester, it passed without issue.
Grewth:
I've lost all the photos of my £200 CB750F1 that I threw together around 1990.
I cut up three really rough aftermarket 4 into 1 exhausts, then built a hybrid system from the bits using a STICK welder.
Wheels and forks were from a CB900F, I had to weld two sprockets together to get the chain aligned right.
Seat was an aftermarket 2/4 item intended for a GS1000, but pressed into service with a fabricated steel tailpiece.
Skoti:
Looks like my F1 when I bought it.
I followed the "only fix it if it's broken" mantra and all turned out OK in the end.
Please keep us posted on progress.
Good luck
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