TS1 question!

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masterblaster1
Posts: 14
Joined: Tue Apr 06, 2010 12:30 pm
Location: Kiel / Germany
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Fri Jul 12, 2019 9:19 pm

Hello
I have a TS1. I want to drive with a crankshaft 60x116.
The TS1 is machined at the exhaust port 1.5mm to the top.
My porttimings are 192 ex and 124 tp with the crankshaft.
I have a piston with 30 crown.
My piston is 0.5mm below dc.
What can i do to lower the exhaust duration?

I have measured from top of the cylinder to exhaust : 31mm
from top of the cylinder to transfer : 45mm

Many greetings Robin

Mrnice71
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Posts: 81
Joined: Tue Jul 11, 2017 9:41 pm
Main scooter: Lambretta series 3
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Sat Jul 13, 2019 10:43 pm

Have you had a look at the port timings calculator on Lambretta images archive webpage

holty
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Main scooter: lambretta gp
Location: east yorkshire
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Sun Jul 14, 2019 9:42 am

you could machine the base of the cylinder to reduce exhaust timing

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