Search found 24 matches

by rasputin
Wed Mar 11, 2015 6:10 pm
Forum: Scooter Performance Garage
Topic: Tuning 1980 Vespa p125 for the Salton Sea TT
Replies: 6
Views: 3958

I raced grasstrack and a little bit of scootercross, 10 years or so ago. They were (and still are) fun events, nothing serious. We simply put those knobby Pireli tires, and that was it. Great tires, now long gone. Nowadays, there's only one Chinese tire available (I don't know the company name) whic...
by rasputin
Wed Nov 26, 2014 7:46 am
Forum: Scooter Performance Garage
Topic: 2009 50cc YY50QT-30 M-80 acceleration problems
Replies: 3
Views: 2910

Did he only suggest the new belt and weights, or did he actually install these parts.

r
by rasputin
Tue Aug 12, 2014 1:42 pm
Forum: Scooter Performance Garage
Topic: ymymymym
Replies: 3
Views: 2612

generally, the higher the primary compression ratio, the better the bottom rpm power. at a certain "state of tune", a short conrod will limit the engine's ability to "breathe properly". that's one of the reasons for longer conrods. the other reason is that longer conrods will red...
by rasputin
Fri May 02, 2014 12:23 pm
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

manolis wrote:This happens every time a new idea (that challenges the state-of-the-art) is published.

in order to challenge the state-of-the-art, you'd need to know it first. :D

i'm outta here. I'll not be doing your homework for you.

r
by rasputin
Thu May 01, 2014 10:16 am
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

I can't believe you seriously think that the SECVT of Suzuki is simpler than the PECVT PatBOX. i can't believe that you are comparing a tried-and-proven system with a concept sketch that you made less than 24 hours ago. build a prototype of your system. then develop it to the same sophisticated lev...
by rasputin
Thu May 01, 2014 8:09 am
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

i can only repeat myself here:
rasputin wrote:you are replacing something simple with something complicated. a step backwards.


electronically-controlled cvt may be a good idea for dedicated race vehicles, but i would prefer the suzuki system over your system at any time, because it is more simple.

r
by rasputin
Wed Apr 30, 2014 2:19 pm
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

by rasputin
Wed Apr 30, 2014 2:54 am
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

by rasputin
Tue Apr 29, 2014 2:18 pm
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

by rasputin
Mon Apr 28, 2014 7:56 pm
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

by rasputin
Sat Apr 19, 2014 1:03 pm
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

I thought there was only a centrifugal controller / governor (the variator) in the conventional CVT. It seems there is another mechanism that, depending on the load, shifts the transmission ratio. Is there? check the slots on the rear pulley: http://www.scooterkingz.com/images/product_images/info_i...
by rasputin
Fri Apr 18, 2014 2:22 pm
Forum: Scooter Performance Garage
Topic: PatBox CVT (Continuously Variable Transmission)
Replies: 35
Views: 60351

I.e. for each vehicle speed [...] the conventional CVT has only one [gear ratio] that's not true. scooter cvt adjust their gear ratio to speed AND LOAD. With the PatBox you can use the automatic CVT as usual, but you can also select the gear ratio you like. a solution in search of a problem. just l...
by rasputin
Thu Feb 27, 2014 9:21 am
Forum: Scooter Performance Garage
Topic: Vespa tuning advice
Replies: 6
Views: 3944

dr were basically "optimized" spare parts". pinasco parts are a little bit more "sportique spare parts". polini and malossi are actually "tuning parts". usually, i prefer polini (for no real rasons, it's only a prejudice), but for the 125cc px engine, i prefer the ...
by rasputin
Fri Feb 21, 2014 3:14 pm
Forum: Scooter Performance Garage
Topic: Vespa tuning advice
Replies: 6
Views: 3944

it would be wise to know the carb size, intake type, and exhaust type, before discussing any actions.

generally, these "small block" vespas can be tuned to 25-30 hp without major problems.

r
by rasputin
Tue Jan 28, 2014 2:32 pm
Forum: Scooter Performance Garage
Topic: Gear ratios?
Replies: 4
Views: 2260

i'd invest the time to count the gears first. gy6 engines come with a multitude og gearings. quite often, those "tuning gears" are a step backwards.

r

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