Some Easy Low Cost Performance Mods
Post Reply    Forum -> Project Reports
Author Message
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Thu Jan 03, 2019 3:44 pm quote
I just got a GTS 300 and I'm loving the scooter so far, but I want to see if I can increase the performance a little.

I started by ordering a medium height Faco screen. The screen on there now is the tall Prima screen which protects well but doesn't look very aerodynamic.

As part of the maintenance, I thought I'd try a Malossi double sided red sponge and Iridium plugs. The plugs I have now are the double electrode type. I pulled the stock sponge, and it is already falling apart.

I don't know if I want to go so far as to replace the variator. I think I'll just try some Dr. Pulley sliders. Looks like 21x17 is the right size, but I"m not sure what would be the best weight.

I may also try a Malossi lambda emulator. I'm leaning against an aftermarket muffler (I am too old for a loud muffler), but I thought the emulator might still help.

Anyway, does anyone have any experience with different weight sliders? What is the best weight for the sliders?

Also, is the emulator a good idea or is that something that would make more sense with a more modified engine? I'm just doing little things here and there. Probably the ECU will compensate on its own for any additional air flow. If that is correct, am I throwing money out the window by getting an emulator?


Last edited by 1112GTS300 on Sat Jan 12, 2019 1:02 pm; edited 2 times in total
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Sat Jan 05, 2019 5:51 am quote
Well, I tried the Malossi double sided red sponge and Iridium plugs; and that seemed to have a noticeable positive effect on performance. So I'm happy so far.

I also decided on 21x17 12g Dr. Pulley sliders for the variator. As soon as I get those installed, I'll report back with results....
Ossessionato
09 190s taormina
Joined: 08 Apr 2010
Posts: 2069
Location: Googleville
Mon Jan 07, 2019 9:41 pm quote
1112GTS300 wrote:
Probably the ECU will compensate on its own for any additional air flow. If that is correct, am I throwing money out the window by getting an emulator?
Would agree with that statement. Couple 300s in my neighborhood running pipes and pod filters with stock ECU and no apparent issues.
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Sat Jan 12, 2019 12:40 pm quote
Windscreen and Lambda Emulator
Today I added a Faco medium windscreen and Malossi Lambda Emulator. And that resulted in another positive increase in performance.

I am mostly interested in top speed, since I have to do a little highway driving to get from my house downtown. My GTS was doing about 72 mph top speed with no mods and the old full size Prima windshield.

I am 6' 250 lbs on a good day. The old windscreen was a barn door.

With the Faco medium windshield, Malossi Lambda Emulator, Malossi Sponge Filter and Iridium plug, I'm easily up over 80 mph. That's pretty good for less than a few hundred dollars worth of easy add ons.

I still have the stock exhaust. And I"m too old for loud pipes. So I may tear into the variator next....
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Sat Jan 12, 2019 3:37 pm quote
I installed Dr. Pulley Sliders: 21x17 13g. with the Fuzzy Washer Mod.

Even with the 13 g sliders the engine revs noticeably more than usual. I'm not sure whether I like that. It's like shifting a little later than you otherwise would.

I also tried 14 g sliders with the washer mod. They work even better, IMHO.

I'm sticking with the 14's....

Last edited by 1112GTS300 on Wed Jan 23, 2019 12:07 pm; edited 2 times in total
Member
Primavera 150
Joined: 09 Sep 2018
Posts: 12
Location: San Antonio, TX
Wed Jan 23, 2019 9:32 pm quote
1112GTS300 wrote:
I installed Dr. Pulley Sliders: 21x17 13g. with the Fuzzy Washer Mod.

Even with the 13 g sliders the engine revs noticeably more than usual. I'm not sure whether I like that. It's like shifting a little later than you otherwise would.

I also tried 14 g sliders with the washer mod. They work even better, IMHO.

I'm sticking with the 14's....
Curious if youíve tried a different air filter.
Ossessionato
LXV 150 Midnight Blue (SOLD)
Joined: 06 Dec 2010
Posts: 2434
Location: Bangkok
Wed Jan 23, 2019 10:08 pm quote
1112GTS300 wrote:
I installed Dr. Pulley Sliders: 21x17 13g. with the Fuzzy Washer Mod.

Even with the 13 g sliders the engine revs noticeably more than usual. I'm not sure whether I like that. It's like shifting a little later than you otherwise would.

I also tried 14 g sliders with the washer mod. They work even better, IMHO.

I'm sticking with the 14's....
So you are back to stock now?
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Thu Jan 24, 2019 5:26 am quote
Dr. Pulley
I'm using Dr. Pulley 14 g. sliders. The engine doesn't rev as much as the 13 g. but I got a big bump up in speed. Last night I got it up to 85 mph.

I did some searching on this forum and found a post from Scooterwest suggesting 14 g was the way to go, and I agree based on my limited experience.

The shape of the Dr. Pulley sliders gives you a wider range, and the benefit is most noticeable on the top end. Lighter weight rollers may give a benefit with other engines, but I didn't find any benefit to going lighter with the 300.

So I'm running this:

Malossi dual element filter
Iridium plug
Malossi labmbda emulator
Dr. Pulley 21x17 14 g. with extra washer
Medium height windscreen
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Thu Jan 24, 2019 5:28 am quote
I have a Malossi red sponge but I haven't tried it yet. My mods are pretty subtle so I'm not sure its a good match. I got it because I was thinking of trying an exhaust, but I"m on the fence about doing that....
Hooked
GTS 250
Joined: 26 Apr 2008
Posts: 172
Location: California
Thu Jan 24, 2019 4:49 pm quote
Re: Dr. Pulley
1112GTS300 wrote:
Last night I got it up to 85 mph.
At those speeds you should be mindful of your oil pan gasket... The CVT belt will rub the case and eventually blow the oil-pan gasket.
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Fri Jan 25, 2019 5:07 am quote
Fuzzy Washee
I did the fuzzy washer mod. How do I know if the belt is rubbing?
Hooked
GTS 250
Joined: 26 Apr 2008
Posts: 172
Location: California
Fri Jan 25, 2019 7:48 am quote
Only way to know for sure is to take the CVT cover off and look a few inches behind the front pulley.
Enthusiast
300 super sport Full Malossi and carbon Edition
Joined: 26 Nov 2016
Posts: 82
Location: Netherlands
Fri Jan 25, 2019 11:03 am quote
You are never to old for a loud muffler
I am 55 year and i love it

6994D4C4-FF7E-48CE-BCC9-DE67E9A2A683.jpeg

Hooked
GTS 250
Joined: 26 Apr 2008
Posts: 172
Location: California
Fri Jan 25, 2019 11:23 am quote
335Rick wrote:
You are never to old for a loud muffler
I am 55 year and i love it
Nice bike! I like your style.
Banned
2:6
Joined: 11 Jan 2007
Posts: 7368
Location: San Francisco
Tue Jan 29, 2019 9:19 am quote
for top speed, I'd go with an up-gear as the very first mod.

The 300 produces power at a lower RPM than the 250 did but they have the same gearing. This causes the 300 to be past its peak when it hits the limiter (~82mph).

second would be the PM68 exhaust.
Member
Primavera 150
Joined: 09 Sep 2018
Posts: 12
Location: San Antonio, TX
Fri Feb 08, 2019 5:01 am quote
I have a GTV Sei Giorni. Iíve been thinking about making some simple mods. What are the easiest ones to make and still a little performance improvement? I have no interest in messing with the cvt.

Also on exhaust, I want something with more purr and maybe a little deeper, but I donít want to break the bank. What are some good options?

For safety, thinking of going all LED. Has anyone done this?

Lastly, is there. A decent horn upgrade?
Member
GTS 300 Super
Joined: 31 Dec 2018
Posts: 38
Location: Florida
Fri Feb 08, 2019 5:37 am quote
Horn Upgrade
I'd put a Freeway Blaster in there. I think I got mine from Aerostitch.
2019 Spring Gathering - May 16 - 19, Location TBD (Likely Maggie Valley, NC)   vespa scooterwest scooter west Motorsport Scooters   Yelcome Leather Top Cases and Roll Bags for Piaggio Vespa PX LX LXV GTS GTV
Post Reply    Forum -> Project Reports
[ Time: 0.5042s ][ Queries: 25 (0.0993s) ][ Debug on ]