JCosta on Tmax 530

Post by **Ferret** » Wed Mar 04, 2015 6:55 pm

The j Costa is a nice piece of kit but does not produce enough gains for the purchase price especially when compared to DR Pulley sliders etc . I would get a Dr pulley HIT clutch instead .

Post by **michaelphillips** » Wed Mar 04, 2015 7:19 pm

not sure if they do a hit clutch not listed in their catalogue, i wonder if anyone tried the polini variator as that has 12 rollers and you can get dr pulley weights for that or Dr.Pulley Tuning Sportvario for tmax530 with weights its around 270 euros

Post by **Ferret** » Thu Mar 05, 2015 10:53 am

Most of the people with t max 500 on the French site use Dr pulley s in a standard variator but have the pulley angle machined ,which really works well .You can get machined pulleys from scoot fusion . The HIT clutch was fitted to some max,s on the site and was so adjustable that you could if it rocked your boat set it to pull wheelies lol . I spoke to a chap who's fitted one to his srv and he can't rave about it enough especially at take off and also claims it's faster at the top .

Post by **tmaxrob** » Thu Mar 05, 2015 2:02 pm

MrGrumpy wrote:This also suggests why fitting a J Costa or something to a 530 that lets it rev more may not produce a lot of benefit.

The acceleration throughout the range and from any speed was very impressive

so there was a marked difference. It comes down to personal opinion as to whether you see that as a benefit or not. I didn't, since any opening of the throttle from a steady state would see the the revs shoot up. To an onlooker, it would sound like you're really working it. Road manners when filtering through central London traffic suffered as a result of the the blippy throttle and elevated bite point. Get to the front of the traffic line tho, it's fantastic when the lights go green

Overal tho it was a less pleasureable ride. It was using the rev range of the motor *all* the time rather than when it really needed to. The lazy smooth torque you get with the std setup at the sacrific of seat-of-the-pants-kick-up-the-road makes for a better ride overall in my opinion. You can't have both with a scoot - thats what gears are for

Post by **MjW** » Thu Mar 19, 2015 8:34 am

michaelphillips wrote:not sure if they do a hit clutch not listed in their catalogue, i wonder if anyone tried the polini variator as that has 12 rollers and you can get dr pulley weights for that or Dr.Pulley Tuning Sportvario for tmax530 with weights its around 270 euros

Will be soon fitting the Polini Evo 3 with Dr.Pulley sliders and polini 8.3gr rollers to my mk3.

Pulley rollers weren't recommended for this vario.

Post by **Steve_D** » Thu Mar 19, 2015 9:20 am

If the OP hadn't have been told by the dealer (or the original seller hadn't informed the dealer), the OP would be none the wiser regarding any hidden modifications so entirely plausible.

Post by **michaelphillips** » Thu Mar 19, 2015 4:21 pm

MjW wrote:
michaelphillips wrote:Will be soon fitting the Polini Evo 3 with Dr.Pulley sliders and polini 8.3gr rollers to my mk3.

Pulley rollers weren't recommended for this vario.

good on ya lad... let us all know your findings please, and some fitting pic`s if you doing yoursen

Post by **MjW** » Thu Apr 16, 2015 4:33 pm

Got the tmax yesterday. First thing I did was to put the db killer back on.

The bike is noticeably faster on full throttle. The speed needle has trouble to keep up. The downside is too many revs which results in too much noise. It might be faster than before but it sounds slower if that makes any sense. It tries so hard that you kind of expect it to go fast.

Accelerate slowly up to 40mph and it sounds a lot, even then. It feels like the tmax transformed from a mature fast maxi to a faster 2-stroke Gilera Runner FXR wannabe.

I like the speed. The rest not so much. I will evaluate a few more days and decide if I'm going to keep it or if I'm going to go back to stock vario with Dr.pulley weights/sliders.

Post by **michaelphillips** » Thu Apr 16, 2015 4:55 pm

yes the polini variator weights are only 7.5 gms each and there are 12 of them making 90 gms
you need to do the calculation on the dr pulleys to see the gross roller weight. then see if the polini stock weights are too light, as you probably fitted the contra spring, the rollers are not gripping the belt, or you may be getting a little belt spin.. if you can find out the standard stock weight of combined rollers and post,

Post by **MjW** » Thu Apr 16, 2015 6:37 pm

I'm using the 8.3gr set. Don't really get what you tell me to do though. :/

I think I did fit the spring you say. The blue one in the pic.