A little more top end

[mrmike]

     Over the last 15 years I've had 4 new Kymco scooters. I started with a People 150 (2010), GTI300 (2012), X-Town 300I (2021). I'm over 80 now so I went back to the lighter '23 People S 150 I have now. This scooter is just about perfect for me. It's lightweight and nimble in the city. I've modded it to my liking by lowering the wind screen, installing City Grip 2 tires, and replacing the stock 13gr rollers with Dr. Pulley 11.5gr sliders. The scooter is perfect around town, and the acceleration to 40 or 50 is terrific. The only downside is the top speed. When on an occasional Interstate ride my scooter peaks out at a GPS verified 60mph. Reading all the posts on here, that seems to be normal. I don't want to go back to a bigger and heavier scooter. Is there a big bore kit or any other options available to tweak another 2 or 3 mph top end out of this scooter? 

[Iahawk]

you have guts to ride that on the Interstate! I avoided 55 mph highways at all costs with my People S200 (had roughly same top speed as yours) and never considered hitting the Interstate.

Tuck, shorter windscreen, bump up psi in tires, heavily wax the front fairing....not sure there's much else to do to increase power or speed?  With a motorcycle you could increase airflow with a K&N type filter, a freer flowing exhaust and then you'd need a 'tune' to get the most out of it..

You'd probably need to look to Europe or Tiawan for any existing speed parts for your S150....but the best answer may be to find a bigger scooter? Maybe get a 2nd scooter (that GTI300 would have been perfect...step through, more power)??

[Ruffus]

Yes, there is/are big bore kits out for your scoot.
(NARAKU 180ccm for the 150 i.g., from several producers, all are made in China which is good, coz you get what you pay for).

This kits fit unboxed IF your scoots engineblock is  machined to 63mm to house the new cylinder. Plug and play in this case.

Top end win about 10km/h without changing muffler and other items.
Labour about eight hours, plus oil, chainguard and other small things.

The question is how much you want to invest on hindsight of reducing scoots longevity  and more wear and tear on your CVT.

For a bit more top end speed I would try to revive  original roller weights and polishing front CVT parts in combination with a minimal shorter belt

[Stig / Major Tom]

Yes, there is/are big bore kits out for your scoot.
(NARAKU 180ccm for the 150 i.g., from several producers, all are made in China which is good, coz you get what you pay for).

This kits fit unboxed IF your scoots engineblock is  machined to 63mm to house the new cylinder. Plug and play in this case.

Top end win about 10km/h without changing muffler and other items.
Labour about eight hours, plus oil, chainguard and other small things.

The question is how much you want to invest on hindsight of reducing scoots longevity  and more wear and tear on your CVT.

For a bit more top end speed I would try to revive  original roller weights and polishing front CVT parts in combination with a minimal shorter belt

Was thinking the same thing about the roller weights, Ruffus.
In-town acceleration increases with those lighter Dr P's, but at the loss of top-end speed. How much loss?.... is debated. But I noticed it in my 163cc Like and in my 155cc Liberty. I very rarely ride either on a 55mph rural highway - never the interstate. The 400 Burgman was my final ride on I-70.
Stig