Just a small point. If you decrease the percent oil, then at the same time you are increasing the percent petrol in your mixture. So your engine will be running richer, and might need a slightly smaller main jet.
I rode a GS150 1959 - 1972. Wish I still had it!
Mike
Search found 3 matches
- Sat Sep 01, 2012 3:51 am
- Forum: Vespa Tech
- Topic: GS150 Ignition Timing
- Replies: 5
- Views: 3486
- Wed Aug 29, 2012 12:23 am
- Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
- Topic: Vespa GTS250-300 "APTO BOX"
- Replies: 5
- Views: 4156
Re: Vespa GTS250-300 "APTO BOX"
Thanks, Shocky. I contributed to that GTSOwners topic. It seems the mod consisted of boring out the throttle body to try to get the APTO box to work. Didn''t always fix it. So I'm not missing out on an extra horsepower or two!
Mike
Mike
- Mon Aug 27, 2012 12:52 am
- Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
- Topic: Vespa GTS250-300 "APTO BOX"
- Replies: 5
- Views: 4156
Re: Vespa GTS250-300 "APTO BOX"
Shocky, what is the throttle body mod? I haven't heard about that one!
I have the Malossi TC Lambda Emulator installed, and am very happy with the results. Wonder how it compares with the Apto box? 4-5 HP sounds a bit optimistic. Has it been dynoed?
Mike
I have the Malossi TC Lambda Emulator installed, and am very happy with the results. Wonder how it compares with the Apto box? 4-5 HP sounds a bit optimistic. Has it been dynoed?
Mike