MAP offset rocker buttons in a T140

Fast Eddie

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As I’m sure most folk here know, the T140 is well known for having a pretty aggressive ‘full race’ inlet cam and a very mild exhaust cam.

The inlet can is good if re timed. But it needs a bigger ex cam to really come alive.

So I got to wundrin… has anyone used offset rocker buttons (sold by MAP these days, Dresda and others used to back in the day) to ‘correct’ the offensively mild exhaust cam?

They give an additional .028” lift. This extra lift would put them somewhere between a E3134 and a Hyde half race cam in terms of lift (from what I understand).

So fitting some offset buttons to the exhaust and re timing the cams would seem a good hop up exercise to me, without necessitating a full strip down to fit new cams.

Am I missing something ?
 
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Hi Eddie,sorry can't help with the cams 😗, but yesterday I was working on a really low milage 1982 Triumph bonneville 750 es really mint, all original burgundy /candy red paint, and the frame and swingarm paint is perfect 2168 miles on the clock, he has all the factory fairing and saddle bags.
The brakes are hanging on, return port blockage or something, will look at replacing the front master for a 13mm one and hopefully rekiting the rear master, front caliper seals are done, and will do the rear caliper as well. Cheers
 
Hi Eddie,sorry can't help with the cams 😗, but yesterday I was working on a really low milage 1982 Triumph bonneville 750 es really mint, all original burgundy /candy red paint, and the frame and swingarm paint is perfect 2168 miles on the clock, he has all the factory fairing and saddle bags.
The brakes are hanging on, return port blockage or something, will look at replacing the front master for a 13mm one and hopefully rekiting the rear master, front caliper seals are done, and will do the rear caliper as well. Cheers
Pictures ??
 
Pictures ??
MAP offset rocker buttons in a T140
MAP offset rocker buttons in a T140
MAP offset rocker buttons in a T140
MAP offset rocker buttons in a T140
 
Wow that’s nice !

Glad you mentioned the mufflers, those turnout things are horrid. I had one on a Tiger Cub, but I was 17 !

Looks like it might have been an Executive (ie originally had a top box, panniers and bikini fairing) ?
 
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