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Chip205
Chip205
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T100R Carburetors
#782864 08/28/19 12:16 pm
Joined: Nov 2015
Posts: 14
acds70 Offline OP
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Hey guys,
I’m thinking of changing my carbs on my ‘72 Daytona to 928’s from the 626’s are you able to open the manifolds to 28mm from 26mm without cracking them? And if anyone out there done it how does it run.
Cheers, Aaron

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Re: T100R Carburetors
acds70 #782906 08/28/19 8:55 pm
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The T100R was already one of the fastest twins at the time so I would be reluctant to change the carbs. However if you are insistent on fitting bigger carbs do nothing more than open the first 5mm of the port to a taper, change nothing else as if you open the whole port you will loose more than than you started with in the first place.

Read Roland Pikes memoirs and the development of the goldstar and you will learn a lot.

The late bsa spitfires also did this with their port as did the early small port twin carb heads.


beerchug

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Re: T100R Carburetors
acds70 #782930 08/28/19 11:40 pm
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The daytona does not need bigger carbs than 26mm for use at anything less than 7000 rpm.
The inlet ports and valves are big on that motor anyway, look elsewhere for performance improvements.
Bigger carbs will spoil the motor for street use. A good exhaust setup and higher compression with
worked pistons will be a better 'bang for your buck'. I had one that was a 100 mph bike and standard,
what more are you looking for? They were one of the best motors triumph produced in many people's
opinion.

Re: T100R Carburetors
acds70 #783140 08/31/19 10:21 am
Joined: Nov 2015
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acds70 Offline OP
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Thanks for the info guys. I had a 1 928 premium so was thinking about it but like the info and advice so 626 it is.
Cheers, Aaron

Re: T100R Carburetors
acds70 #783580 09/06/19 4:50 am
Joined: Nov 2012
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For measure I rode a Daytona with 930’s on it
Assumed it would be terrible..it ripped! I was very suprised how snappy it was. Not saying it was correct but it worked.
The owner had aggressive slides in them to recoup the throttle response but with my 180lbs on it just before shift the bike would lift the front wheel in 1st.
Engine was stock..exhaust headers stock with straight through cocktail shakers and stock gearing.

Way too much Carb..but it ran ok


Full time classic motorcycle mechanic and enthusiast to a fault

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