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I replaced my stock exhaust on my GS 1000 ST ( european spec) fitted with VM 30 carbs with a V&H 4 into 1.
The bike went fine until you reached 50% of throttle opening.
No way to use the full throttle!
OK, so time to change the main jets from the OEM 97.5 Mikuni size.
Not to worry, I fitted larger main jets from a Dynojet kit I had laying around.
Size 114 equivalent to 107 Mikuni I believe.
This time impossible to run the bike with more than 1/4 throttle opening
OK, let's go leaner than OEM...
I fitted Mikuni 92.5's as 95's were not available locally.
The bike now runs very well thank you
What's all this marketing BS about all these aftermarket pipes supposedly flowing better than OEM
The bike went fine until you reached 50% of throttle opening.
No way to use the full throttle!
OK, so time to change the main jets from the OEM 97.5 Mikuni size.
Not to worry, I fitted larger main jets from a Dynojet kit I had laying around.
Size 114 equivalent to 107 Mikuni I believe.
This time impossible to run the bike with more than 1/4 throttle opening
OK, let's go leaner than OEM...
I fitted Mikuni 92.5's as 95's were not available locally.
The bike now runs very well thank you
What's all this marketing BS about all these aftermarket pipes supposedly flowing better than OEM