GTS OWNERS CLUB

darklord · Posted: Wed Dec 10, 2008 12:18 pm Post subject: 300cc Need for speed

I decided to run to the ACE (north London) on Saturday morning for a breakfast. Apart from the fact that it was bloody freezing and the poor scoot ended up white with salt it was a good morning out. The 300 performed perfectly and did the whole journey on 9 pounds worth of fuel, the distance from Hayling Island I do not know but going via the Meon valley via Alton then M3 - M25 -M4- north circular felt like about 80- 90 miles. On the country roads the performance is adequate but on the motorway all is well up to 75mph then there is a black hole just a slow build up. More power is needed between 75-85 mph I don't need the bike to do much more but as it is it will need tinkering . So first its pm pipe and pm gizmo electric thingamegig, has anyone done that yet? I know someone has posted the conversion resulting in 100mph but I find that hard to quantify without a lot more power than is shown on the graph that Cheeky posted. Nitrox? Razz

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Vespa 300 super BSA Bantam, pushbike

CheekyThomas · Guvernor Joined: 18 May 2007 Posts: 1374

I would spend the money on a variator kit to boost rideability... an exhaust might offer a little gain, but you really only buy them for the noise.

Getting decent noticable gains on a 4t without spending a lot of money is hard work.

CheekyThomas · Guvernor Joined: 18 May 2007 Posts: 1374

But you can be guinea pig anyday!

(Dont forget the free performance increase available from dealers via the ECU upgrade)

darklord · Posted: Wed Dec 10, 2008 1:08 pm Post subject:

New variator ! good idea ,any recomends?
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Vespa 300 super BSA Bantam, pushbike

rainham boy · Posted: Wed Dec 10, 2008 6:20 pm Post subject:

smirnoff · Posted: Wed Dec 10, 2008 7:12 pm Post subject:

AIRMECH · Inspector Joined: 05 Jan 2008 Posts: 260

TFI unit complete waste of money unless like myself you happen to have access to a dyno for a whole day,but for the average punter at 50 quid an hour not happenin`back to back dyno runs with malossi and polini variators shows no difference except the polini locks out earlier and the malossi holds on slightly longer.PM pipe does show a proggressive gain across the whole rev range but not as much as stated,14gram rollers and a 140 rear tyre will sort out top end speed with variator.
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Pompey Rich · Posted: Wed Dec 10, 2008 8:06 pm Post subject:

Have you got a screen fitted? My 250 felt a bit nippier when I fitted one. Very Happy

kevin..in · Joined: 30 Aug 2008 Posts: 17

rainham boy · Posted: Wed Dec 10, 2008 9:20 pm Post subject:

got my sliders from scootertrap in the states but i think you can get them over here now

http://www.scootertrap.com/Vespa%20GTS250.htm

about halfway down page
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Darkside, Norwich Broadsmen SC

MikeHolland · Posted: Wed Dec 10, 2008 10:31 pm Post subject:

I had a DR.Pulley variator in my GT200, with excellent results.

But I have fitted a Polini variator to my GTS, as a consequence of that variator review in Scootering magazine. I am surprised that 13-14 grams is recommended here, as PM provide the Polini with 11.8 gram rollers, and these keep my revs at 8500rpm when full throttle accelerating or hill-climbing, where the scooters max power is.

Mike
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Vespa GTS250 Vintage Red

AIRMECH · Inspector Joined: 05 Jan 2008 Posts: 260

the rollers that come with the variator are wot polini supply,i run 14 grms in my malossi vario ....no probs,on the 250/300 you would hit the rev limiter all the time with rollers of that weight,however with a larger back tire this wouldn`t be the case,also depends on whether you are 2up as well,but fitted loads and the best results definetly aint with 11.8 grms.
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smirnoff · Posted: Thu Dec 11, 2008 6:34 am Post subject:

Thermal Mick · Sargeant Joined: 20 Aug 2008 Posts: 96

There's also the J Costa.Different design and more expensive but the rollers/bullets are supposed to last longer than polini rollers.I've got one fitted on my 250 and I realy like it.Takes off like a bullet,especialy rolling on from 20 or 30,sits happily at an indicated 90 with plenty to spare.What I like most though is its very smooth. Very Happy