Scooter Update! Much faster ;]

[Azraeille]

I meant to post this much sooner but I haven't had the chance. A quick synopsis though.

Sometime last week I installed my Naraku High Speed Variator and drive pulley. Went from cruising speed of 36-38mph to cruising speed of 40-42mph. Going uphills didn't improve nearly as much. Went from max speed of 46-47mph at 10,500rpm to 52mph at about 8,800rpm. Also kept similar [slightly improved] acceleration with a bonus of keeping rpms much lower.

A few days ago I installed my Stage6 Pro Replica pipe and 18mm Mikuni carb. HUGE difference. Acceleration is significantly quicker and plus it sounds better. Has a 72.5 jet and appears to be running slightly rich with oil/gas splatters on the side of the exhaust. Also need to move the gasket a bit. I think it has a slight exhaust leak. Taped off [but not removed] the EGR hose. Thinking of opening it up to retain stock air box but increase airflow. Almost definite upjet following. I also think the carb is not tuned correctly yet due to gas mileage. Mileage from stock [75-80mpg] dropped to about 55mpg. I understand the higher speeds and bonus acceleration takes it down, but 20mpg?

Huge speed gains from pipe :] It has no restriction and hits about 9,000rpm which according to the tech page is still 1,500rpm below peak power output. Due to the high speed variator maybe the powerband dropped? Either way, cruising speed is 49-51mph with proportionately better hill climbing. Still need to install my "medium" Stage6 torque spring. Trying to locate a band wrench big enough to fit my clutch, which is approximately 4.25-4.5in in diameter. Max speed that I'm seen on GPS is 54mph but I've gotten the needle further than that when I wasn't able to use GPS. Estimated top speed I've reached is 56mph based on formula to correct my speedometer. Downhill of course Speeds seem to become slightly less inaccurate the faster I go. Max rpm still hasn't peaked 10,000rpm since the addition of the pipe.

[90GTVert]

If you are riding harder or at more throttle opening, that'll suck down a lot of gas. Don't know that you are, but I tend to really test out my new parts. ;D I only get 55-60MPG on my stock engine because I'm always WOT.

The variator won't cause your powerband to drop. The powerband is where your engine is making it's best power. That can be from the cylinder or pipe or other factors, but the CVT really has no bearing on it. CVT should be dialed in to suit the engine's needs and your preferences. Even though you see figures with pipes that say peak power is at X RPM, that doesn't mean your combo will peak there. Use specs for somewhere to start, but tune however it's giving you the best results.

Thanks for the updates. Big improvements! :thumb:

[Azraeille]

So I went on a very long ride today. It was supposed to be a total of 270 miles round trip. I got about 85 miles and my belt snapped. Had to have a friend with a truck come pick me up.

Honestly, I guess I'm surprised the stock belt lasted until 2,500km and stood up to the upgrades I've done. I guess 97 degree weather, poor ventilation, and nearly 90 miles with two small breaks was just too much. I have a new Gates Powerlink Kevlar blend belt on the way. Should get here by Saturday. Scooter Parts Express treats me well :]

I'll also be looking heavily into cooling the transmission. Obviously I don't have enough airflow right now cause that thing gets HOT. My pipe is cool to the touch before I can leave my hand on the CVT cover.

Yeah, I didn't figure that transmission tuning could drop the powerband but I couldn't think of any other way that the peak power rpm for me would be that much lower. I've barely even experimented with rollers since I put the pipe on.

[90GTVert]

This is the one I did recently. I can usually grab the clutch bell after a ride.

[Azraeille]

How well does something like that perform in the rain or on wet roads?

[90GTVert]

Dunno for sure with that exact method. I've rode in pouring rain and through puddles with the one below with no problem. Big difference in heat, but if you are going to ride in all conditions it might be worth sticking to something more like this.