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Scooters - 125 to 300 => Bet & Win 250 => Topic started by: Trancebear on December 24, 2012, 08:37:17 AM

Title: 300cc big bore kit
Post by: Trancebear on December 24, 2012, 08:37:17 AM
Has anybody installed this on their 250? I just installed mine today along with the performance cam. The daylight and heat ran out before I got the rest of my B&W 250 put back together. I am curious what to expect. I also have a 32mm carb, LeoVince exhaust, K&N intake and a complete Polini CVT. This scooter better haul my fat azz around better.(http://img.tapatalk.com/d/12/12/24/6y2e7e2u.jpg)
Title: Re: 300cc big bore kit
Post by: KymcoBW250Fan on December 25, 2012, 04:57:13 AM
I have no doubt. Nice shade of red...
Title: Re: 300cc big bore kit
Post by: Trancebear on December 29, 2012, 05:09:30 AM
I have no doubt. Nice shade of red...


It's Kymco red.
Title: Re: 300cc big bore kit
Post by: pabust on April 05, 2013, 12:38:05 PM
Do you have a review on the 300cc kit and the cam? What about fuel mileage? I have 40.000 kms on mine (25,000 miles) and i was considering that if i do a rebuild which isn't yet necessary because it's running very strong
Title: Re: 300cc big bore kit
Post by: Trancebear on April 09, 2013, 10:25:15 AM
Do you have a review on the 300cc kit and the cam? What about fuel mileage? I have 40.000 kms on mine (25,000 miles) and i was considering that if i do a rebuild which isn't yet necessary because it's running very strong

I highly recommend it. It gives better take off and smother top end. I weigh 350lbs and I have gone a GPS verified 92mph before I got a little scared going that fast on 12" wheels...lol. Since your engine has 25,000 miles on it I would replace the crank bearings and connecting rod bearings while you have the engine apart. The 300cc kit replaces everything else you need to have a rocking engine.
Title: Re: 300cc big bore kit
Post by: LoveMyKymco on April 09, 2013, 03:39:55 PM
Did you use something to etch the metal prior to spraying? If not that paint is going to flake off rather fast. Im interested in doing the 292cc kit for my honda, which one did you use? And how does it sound now? Get some video going! My Reflex 250 runs great but you can tell around 80 its done power wise.
Title: Re: 300cc big bore kit
Post by: Trancebear on April 09, 2013, 04:52:51 PM
Did you use something to etch the metal prior to spraying? If not that paint is going to flake off rather fast. Im interested in doing the 292cc kit for my honda, which one did you use? And how does it sound now? Get some video going! My Reflex 250 runs great but you can tell around 80 its done power wise.

I roughed it up before painting and I use self-etching primer made for engine painting. I used the MRP big bore kit. It is the same as the Polini one and I installed the Naraku high lift cam shaft.
Title: Re: 300cc big bore kit
Post by: LoveMyKymco on April 09, 2013, 05:34:23 PM
Youre on the right track for sure. Ill look into that kit, I know the cam works good on the stock 250 also. Thanks for the info!
Title: Re: 300cc big bore kit
Post by: pabust on April 26, 2013, 02:23:49 PM
Did you use something to etch the metal prior to spraying? If not that paint is going to flake off rather fast. Im interested in doing the 292cc kit for my honda, which one did you use? And how does it sound now? Get some video going! My Reflex 250 runs great but you can tell around 80 its done power wise.

Where did you get your carb and cam from? since i believe the stock carb is too small for a big bore and cam, I have a hard time trying to get in touch with MRP, do you know any other vendor?

A video of your B&W would be nice
Title: Re: 300cc big bore kit
Post by: Trancebear on April 27, 2013, 05:47:02 AM
Where did you get your carb and cam from? since i believe the stock carb is too small for a big bore and cam, I have a hard time trying to get in touch with MRP, do you know any other vendor?

A video of your B&W would be nice

Carb is from here: http://www.scrappydogscooters.com/250cc_Performance.html (http://www.scrappydogscooters.com/250cc_Performance.html)

Cam I bought the same time as the kit from a MRP dealer.
Title: Re: 300cc big bore kit
Post by: mrbios on April 17, 2014, 12:57:35 AM
Has anybody installed this on their 250? I just installed mine today along with the performance cam. ...

Maybe you could post a list of part #'s, brands, MPG, top spped, etc for the kit to make it easer to follow for other GV owners.  Thanks.