gear help: GT 200 on Jet200

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Bidsy
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Posts: 12
Joined: Sun Nov 05, 2017 4:59 pm
Main scooter: Lambretta S2 Eibar Li150
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Sun Feb 10, 2019 11:12 pm

Burnside wrote:
Tue Feb 20, 2018 12:33 pm
I run a Li150 box 17/46 (4.6) on my GT200 with BGM clubman and 30mm Delly, pulls that gearing comfortably. Ignition is static set at 17 degress, on mine.

What gearbox and crown wheel are you currently using?
What jetting do you have with this set up?

Davidsquaredson
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Posts: 174
Joined: Sun Jun 10, 2012 11:41 am
Main scooter: Early Eibar Jet 200
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Mon Feb 11, 2019 3:18 pm

I put my original front sprocket back on, so now stock SX200 gearing, and yes it pulled much better. When I tried to do a top speed test I kept getting stuck in traffic so gave up trying to go faster than 110 kmph, It will have to wait until spring now (I'm in Canada). As an experiment, I also switched from a bgm clubman to a PM tuning Evo pipe. That really cleared up a flat spot I was having trouble solving by jetting adjustments. I will post my jetting next time I have a chance to pop the carb off and check whats in there now (7 scooters, I loose track).
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carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200

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Burnside
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Posts: 269
Joined: Wed Feb 22, 2012 9:22 pm
Main scooter: Lambretta TV200
Location: Norwich
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Mon Feb 11, 2019 5:58 pm

Bidsy wrote:
Sun Feb 10, 2019 11:12 pm
Burnside wrote:
Tue Feb 20, 2018 12:33 pm
I run a Li150 box 17/46 (4.6) on my GT200 with BGM clubman and 30mm Delly, pulls that gearing comfortably. Ignition is static set at 17 degress, on mine.

What gearbox and crown wheel are you currently using?
What jetting do you have with this set up?
I'd need to double check but pretty sure it is;

Main 135
Slide 40
X13 one clip from top
AV268
Idle 55
Choke 70

Pretty much how it came out of the box from Rich Taylor, IIRC only thing I changed was the float needle to a 300

Adam_Winstone
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Posts: 1758
Joined: Tue Jan 31, 2012 8:54 pm
Main scooter: Lambretta GP
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Mon Feb 11, 2019 9:14 pm

Davidsquaredson wrote:
Mon Feb 11, 2019 3:18 pm
I put my original front sprocket back on, so now stock SX200 gearing, and yes it pulled much better. When I tried to do a top speed test I kept getting stuck in traffic so gave up trying to go faster than 110 kmph, It will have to wait until spring now (I'm in Canada). As an experiment, I also switched from a bgm clubman to a PM tuning Evo pipe. That really cleared up a flat spot I was having trouble solving by jetting adjustments. I will post my jetting next time I have a chance to pop the carb off and check whats in there now (7 scooters, I loose track).
... good to hear that you're happier now with the gearing. When Spring comes around you'll have to give us an update on the rest of it too.

Happy riding :)

Adam

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