Hope it's ok to post this here, seems to be read by more than on the carb page.
AF Rayspeed 175 top end, standard exhaust, and a Scootopia 22mm carb. I have a 150 atomiser and slide, and a 200 atomiser and slide as supplied with the carb. Anyone know the best combination of slide and jets to suit the 175 set up? Thanks
Scootopia 22mm carb set up
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Scootermonkey
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How hard can it be!
Lambretta, the finest scooter............IN THE WORLD!
Lambretta, the finest scooter............IN THE WORLD!
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Doom Patrol
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200 slide. I would have thought the 45 pilot would be okay. Main, possibly 118 - 120.
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Tractorman
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I struggle to understand jetting the recommended main jet for a standard GP 200 with a 22mm carb is 118. My 225 mugelo has a 25mm phbl and the main jet is 102, it's been set up on a dyno and runs well. Why is this?Doom Patrol wrote:200 slide. I would have thought the 45 pilot would be okay. Main, possibly 118 - 120.
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Scootermonkey
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Puzzles me too. GP150 main jet 118, same as a 200
Someone suggested a 122 main for the 175 set up. ??
Someone suggested a 122 main for the 175 set up. ??
How hard can it be!
Lambretta, the finest scooter............IN THE WORLD!
Lambretta, the finest scooter............IN THE WORLD!
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Doom Patrol
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You can't really compare the two. The jets on modern carbs seem massive by comparison and can't be interchanged with the original jetting. It's best to think of them as a different range altogether. You sort of start from scratch with the modern Dell'orto's with another set of rules.Tractorman wrote:I struggle to understand jetting the recommended main jet for a standard GP 200 with a 22mm carb is 118. My 225 mugelo has a 25mm phbl and the main jet is 102, it's been set up on a dyno and runs well. Why is this?Doom Patrol wrote:200 slide. I would have thought the 45 pilot would be okay. Main, possibly 118 - 120.
Tractorman wrote:I struggle to understand jetting the recommended main jet for a standard GP 200 with a 22mm carb is 118. My 225 mugelo has a 25mm phbl and the main jet is 102, it's been set up on a dyno and runs well. Why is this?Doom Patrol wrote:200 slide. I would have thought the 45 pilot would be okay. Main, possibly 118 - 120.
my jettex runs a 135 main altho the atomiser has been modified to flow more mid range andits a indian 200 with scootrs pipe runs lovely
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Tractorman
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So will a scootopia carb with an 118 jet use more fuel on than a modern card with a smaller jet?Doom Patrol wrote:You can't really compare the two. The jets on modern carbs seem massive by comparison and can't be interchanged with the original jetting. It's best to think of them as a different range altogether. You sort of start from scratch with the modern Dell'orto's with another set of rules.Tractorman wrote:I struggle to understand jetting the recommended main jet for a standard GP 200 with a 22mm carb is 118. My 225 mugelo has a 25mm phbl and the main jet is 102, it's been set up on a dyno and runs well. Why is this?Doom Patrol wrote:200 slide. I would have thought the 45 pilot would be okay. Main, possibly 118 - 120.
it amazed me in the latest scootering when tuning a standard indian gp200 with an ancilloti and a 22mm carb ended up needing a 175 main jet!!
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bristolmod
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a typo surely??? 115 more like ita.lo.v2 wrote:it amazed me in the latest scootering when tuning a standard indian gp200 with an ancilloti and a 22mm carb ended up needing a 175 main jet!!
Scootering since 1968.