higher top speed

Evans Performance · Post by **Evans Performance** » Tue Jun 03, 2008 5:45 pm

Hi all, i am new here and new to owning a scooter, but far from new to combustion engine performance. i have a couple chinese pocketbikes that i have modded so i have some good info on 2 strokes and i own a small import car performance shop, but i am looking for a little info on getting a bit more top end out of my rattler. i was thinking about doing an exhaust pipe and possible gearing change, but i cant find much for parts. is there anything out there that will get me a true 60mph? i can draft a car and get 60mph on the gauge, but i think that is closer to 55mph and i need to be able to do it without drafting. my commute to work has me in a 60mph zone for about 2 miles

brimstone · Post by **brimstone** » Tue Jun 03, 2008 5:57 pm

welcome and congrats!!

i'm not sure about "gears" or anything but there's new belts you can get, roller weights, pipes and rejetting the carb. those should net you a real 60 (depending on the combination of jetting and weights) versus an indicated. there's also a big bore kit out there somewhere, in asia i believe. ride safe, have fun!

Evans Performance · Post by **Evans Performance** » Tue Jun 03, 2008 6:39 pm

i have heard of the big bore kit, but my rattler is only 4 days old and i dont want to void the warranty.

i know for a higher top speed on the pocket bikes a couple simple bolt ons and a slight gearing change will do a lot.

where do most of you get your parts, scooter works? thats about the only place i can find.

what exactly do the roller weights do? does it change when the clutch grabs or how fast the gearing changes?

nissanman · Post by **nissanman** » Wed Jun 04, 2008 12:22 am

Rollers change how fast the gearing changes. Lighter weight allows higher RPMs first heavier weights give you top gear sooner. Clutch springs effect when your bike takes off (1000, 1500 or 2000 RPM).

Evans Performance · Post by **Evans Performance** » Wed Jun 04, 2008 12:49 am

i really like the way my bike rides. its just a commuter, im not racing it. is there any way to get a higher top speed without reving it higher?

nissanman · Post by **nissanman** » Wed Jun 04, 2008 1:49 am

Without higher revs... only gears or a taller rear tire. You're in Florida right? Try contacting MRP speed and see if they have anythhing.

Evans Performance · Post by **Evans Performance** » Wed Jun 04, 2008 2:23 am

they dont seem to be too friendly to the retail buyer. i did find a dealer of their parts near me and put in an email. hopefully something good comes of this. the scooter seems to have the muscle to get me the speed i want. my top speed is the same with me alone or with a passenger. that tells me there is power left over and i am hitting a wall in another area

nissanman · Post by **nissanman** » Wed Jun 04, 2008 2:31 am

You got that right

MRP does preffer that you use a dealer not them to get their parts. Good in respect to the dealer network, bad cause we can't get any straight answers! I'm sure there's power in there... we've just got to figure out how to get it

KABanshee · Post by **KABanshee** » Wed Jun 04, 2008 5:12 am

Welcome to the crowd dude, look forward to finding the happy medium on these bad boys. It all starts with the aftermarket pipe. The prices are very reasonable on all the parts/mods I've seen so far. I attempted to rejet but Scooterworks sold me the same jet I was already running. I did the 2000 rpm spring and the Prima Pipe. I ha 12 G Rollers but am going to put some 8 g's in when I get around to ordering them. I am also interested in the Dr. Pulley clutch. and the Polini air filter for the added noise.

Groovealufagus · Post by **Groovealufagus** » Wed Jun 04, 2008 6:30 pm

Just ordered the Prima Pipe, Malossi MultiVar 2000 kit (with the variator, hub, sliders, 12g rollers and 2,000 rpm contra spring), Polini filter, and the Dr. Pulley HIT Clutch and clutch bell. Gonna have the shop adjust the compression when they do the work (7:5:1) and use the 1500 rpm clutch springs. Holding out on the carb until I have a chance to peek at the piston kit that Scooterworks is coming out with. But I'm fully expecting to skip on it and go after a Keihin or Mikuni 24mm flat slide carb.

Definitely after more acceleration off the line and throughout the entire cycle more so than any improvement in top speed. That, and some fat VROOM VROOM (instead of weeeee weeee

).

I'm excited to see what she runs like.

KABanshee · Post by **KABanshee** » Wed Jun 04, 2008 7:14 pm

Groovealufagus wrote:
Definitely after more acceleration off the line and throughout the entire cycle more so than any improvement in top speed. That, and some fat VROOM VROOM (instead of weeeee weeee ).

I'm excited to see what she runs like.

First off welcome to the cool cats club. Sounds like you are on the right track to bringin the Rattler to a new level of kick ass fun. I am interested in the all of the stuff you have planned and look forward to learning from your mods.

I am interested in where you came up w/12 g rollers at? I was encouraged to go w/12 g's by Scooterworks but from reading here have leaned more towards 8 g's.

Welcome to the crowd it's great to see the Rattler growing in numbers daily.

2-Stroker's Unite

Groovealufagus · Post by **Groovealufagus** » Wed Jun 04, 2008 7:31 pm

Hi, and thanks for the welcome. I'm really stoked on the scooter. It just needs more oomph (and more VROOM VROOM). Once I make it through that it'll be time to work on suspension, brakes and tires. Should be a lean machine when all is said and done. None the less, I still mostly love it stock.

The 12g weights are recommended by scooterworks, but they also come standard with the Malossi kit. I figured I'd go with them for starters, and if I'm not satisfied, I can bump them down then (maybe go with the Dr. Pulley weights at that point).

I also found this posted in another forum:
"as i said before the pipe is designed to run in the stock RPM range

so if you put in lighter rollers and a 2000 rpm spring now you are not using the pipe in the RPM range it was designed for

if you add the stiffer spring you also need heavier roller weights

if you are reving it to 9000 RPM you are losing power"

I'm actually still a little confused about the weights. I weigh around 145 - 150, and from what I read, the heavier you are, the lighter the rollers should be. Most of the folks riding with the lighter weights are 200+ lbs, and with that in mind, and seeing as how they come standard with Malossi's sport transmission, I'm wondering if they might work out well for me.

The guys at Sportique in Denver didn't recommend lighter weights, and they have done some mods on Rattler's already, so I'm going to put my trust in them, test it out, and go from there.

Evans Performance · Post by **Evans Performance** » Wed Jun 04, 2008 7:32 pm

wow groovealufagus. that thing should be quick. once my warranty is up, you can expect to see my bike fly, but for now i just need another 5 mph on the top end.

i have been loking this scooter over and i have some ideas

Groovealufagus · Post by **Groovealufagus** » Wed Jun 04, 2008 7:37 pm

Evans Performance wrote:wow groovealufagus. that thing should be quick.

Yeah, and my old lady is already uncomfortable with riding the stock bike. Wait until she has all that noise under her ass and it pops it's first wheelie on her

.

Guess she's gonna have to grow some balls.

KABanshee · Post by **KABanshee** » Wed Jun 04, 2008 7:55 pm

Sounds like you have your shiyza together. Lookin forward to reading your feedback.

Eazy · Post by **Eazy** » Wed Jun 04, 2008 7:58 pm

You said you own an import shop right.

Throw on some JDM Turbo NAWSSS!!

Just put it on your account at Harry's.

rofl

Evans Performance · Post by **Evans Performance** » Wed Jun 04, 2008 8:01 pm

its funny you say that, once the warranty is up dont be surprized if it gets some nitrous.

"2 of the big ones" lol

the last part is a joke

Groovealufagus · Post by **Groovealufagus** » Wed Jun 04, 2008 10:53 pm

Well, I think I might have read the Malossi roller spec wrong... I think this might say 5g weights, not 12g...

. Might need to get the 8g sliders from Dr. Pulley, after all. Hmmm. Maybe I'll try it out first.

nissanman · Post by **nissanman** » Thu Jun 05, 2008 2:12 am

5's huh, that Rattler will stand right up with those! I ran 6.5's and boy did it snap... but had no good top end left. I'm running a combo of 6.5s and 10's now (equals 8.25's)... that's why I think I'm going with 8's before too long

Eazy · Post by **Eazy** » Thu Jun 05, 2008 1:36 pm

nissanman wrote:5's huh, that Rattler will stand right up with those! I ran 6.5's and boy did it snap... but had no good top end left. I'm running a combo of 6.5s and 10's now (equals 8.25's)... that's why I think I'm going with 8's before too long

The rattler 50 I was working on I put 5's in.

Set the idle a little high and you were pretty much throttling right into the expansion chamber.

It was almost a little scary to ride in the rain.

Groovealufagus · Post by **Groovealufagus** » Thu Jun 05, 2008 3:14 pm

6 HTRoll Ø 19x15,5 gr.12

12g - I was right the first time around. Phew.

Evans Performance · Post by **Evans Performance** » Thu Jun 05, 2008 5:47 pm

yoiu are saying that lighter weights will take away top end, will heavier weights add top speed?

nissanman · Post by **nissanman** » Thu Jun 05, 2008 9:35 pm

Heavier weights get to top "gear" quicker which will make the bike feel slower off the line. Lighter weights will give you better take off from the line but need more time to get to the top "gear". It's like sitting on the inside of the merry-go-round or the outside... wait a minute. I may be the only one that will get the merry-go-roung comparison, someone else explain it

Evans Performance · Post by **Evans Performance** » Fri Jun 06, 2008 11:08 am

i understand how the weights affect the timing of the gearing changes, but in an earlier post you said

nissanman wrote: I ran 6.5's and boy did it snap... but had no good top end left

thats why i thought maybe it would have an effect on the final gear also

nissanman · Post by **nissanman** » Fri Jun 06, 2008 11:42 am

I see. If the weights get too light then you can lose some top speed too. The weights can never push out hard enough to give you top "gear".

Evans Performance · Post by **Evans Performance** » Fri Jun 06, 2008 11:55 am

ok, that makes sense. i cant believe there is no way to change the gearing on these things.

i have emails in to 2 scooter shops and nobody will get back with me.

nissanman · Post by **nissanman** » Sat Jun 07, 2008 12:47 am

Oh there's a way... we just don't know about it yet in this country

Somebody's got to know of some alternate gears for a PGO PMX Naked!

jim_0068 · Post by **jim_0068** » Mon Jun 16, 2008 6:13 pm

You actually have to change the final gearing in the CVT.

Evans Performance · Post by **Evans Performance** » Mon Jun 16, 2008 6:21 pm

thats what i expected, but where can i get the parts to do it?

jim_0068 · Post by **jim_0068** » Mon Jun 16, 2008 6:24 pm

That's the trouble...i don't know either. I know there are some videos of people on youtube changing gears, so maybe you could email them and find out. On the chinese scoot forum i used to hang around at, someone did change the gears but he is in Australia and got them locally and his guy won't export.

BGK · Post by **BGK** » Mon Jun 16, 2008 6:30 pm

Evans Performance wrote:ok, that makes sense. i cant believe there is no way to change the gearing on these things.

i have emails in to 2 scooter shops and nobody will get back with me.

What makes you think that you are running out of gear? Usually you have to at least double the stock power output to necessitate an upgear. As a rule of thumb, if you get the same top speed up a modest hill or into a modest headwind as you do on a windless flat, then an upgear would be useful. If not, then you'll end up having something that's a but slower because you won't be able to pull the highest ratio.

Evans Performance · Post by **Evans Performance** » Mon Jun 16, 2008 6:44 pm

i get the same top speed almost no matter what, solo, with passenger, head wind, ect. the only thing that lets me get a couple more mph is drafting a truck, but it seems that the engine is revving as high as its going to but it has the power to push more

MPA · Post by **MPA** » Thu Jul 03, 2008 3:09 pm

did you notice any performance difference w/ the malossi variator?

Groovealufagus · Post by **Groovealufagus** » Thu Jul 03, 2008 9:31 pm

MPA wrote:did you notice any performance difference w/ the malossi variator?

Stuff's sitting and begging to be installed, but my left (dominant) hand has been in a cast for three weeks (2 to go and down-counting) so I haven't been able to do anything, including ride.

I will post here about how the mods worked out as soon as I get them installed.

This broken wrist and thumb thing is a huge bummer. Be careful with that front brake.

vespatech · Post by **vespatech** » Fri Jul 04, 2008 12:39 am

has anyone tried buddy drive gears? i know the 125 has a taller gear: but not sure if they match up