ScootDawg's Project Bike
2005 United Motors Matrix 150
With the exception of the windshield and top trunk, all after market parts were supplied courtesy of Martin Racing Performance. I encourage you to click the MRP logo above and visit their website. Joel Martin, President has been very kind in supplying these parts to Dawg.
On this page, you can see all that has been installed to date and see the results. If you would like to take part in discussion or see what's going on behind the scenes, feel free to visit the forum.
Here is how United Motors Matrix 150 tested entirely stock:
Air pressure on all tests is maintained at precisely 31 lbs pressure in each tire.
Speed (All speeds are measured via GPS):
Top speed 54.4 mph.
¾ mile 9% grade hill- top speed 34.8 mph
(this is one of the steepist hills in K.C. City code allows a max 10% grade)
Zero to 30 mph= 7.12 seconds
Zero to 40 mph= 13.25 seconds
Mileage:
Avg. MPG = 74 MPG
Sound:
dB level measured 10 inches from exhaust pipe at idle = 65dB
Max dB level at chest level (behind the windscreen) during acceleration = 90.5dB
MRP GY6 Performance Exhaust
30mm Keihin Carburetor
fitted with 120 main jet and uni-filter
MRP Racing CDI
Bando Coil
NGK Iridium Plug
MRP Alloy Manifold
Dark Chrome MRP Transmission Cover hides Dr. Pulley Variator and MRP Kevlar belt
This was a fruitful install. The variator and sliding rollers allow for a slightly higher gear ratio. Top end of 66-67mph has been achieved. Acceleration didn't improve much in the 0-30 range, however 0-40 is now under greatly improved at 8.7 seconds. I expect the installation of a new clutch to slightly improve the low end. I've found the best results for me were with 10 gram weights. The weights that work best for you could easily be different. It depends on the type of performance you are wanting, rider weight, terrain, etc.
Racing CDI and Coil
This didn't do a lot for me. The CDI has a spark advance adjustment. Note that I found a place on the frame to mount the CDI. Note it is mounted for easy access to the advance adjustment. I guess for the racing guys, every little bit helps. I don't think it's a cost effective modification unless you are the type of guy who must have all the toys.
Installation is pretty simple. The coil is plug and play. All you need to know about the CDI is that the red wire goes to the positive battery terminal. The small switch is now the kill switch. You can barely see it in the picture to the right but I found that it mounted nicely where the screw latched the front hatch under the seat. The switch must be on for the engine to start. I don't think this would be compatible with an alarm system.
Click the thumbnails to enlarge.
Puig Windshield
Givi Trunk
The windscreen is solid and has very little vibration. It does a good job of guiding the wind off your torso. If you are racing down the road with your scooter buddies and some of them are passing you, just duck your head low behind the screen and feel your bike surge ahead.
The Givi trunk is great. Plenty of room for helmet plus more. My only complaint is that the lid rattles sometimes, but I've never met a trunk who didn't rattle. Finding the right weatherstrip will cure.
Drink Holder
The picture says it all. Joel at MRP sent this.
(Shhhhh, it holds beer too.)
Tiny Tach
Certainly, a tachometer is not a necessity for most scooterist. However, the guys that like to tinker need one. I like to tinker. Installation is a breeze.
Summary of improvements to date:
Top speed is up 12mph.
Five seconds dropped off acceleration to 40mph.
Four mph gain on 9% grade hill.
Torque greatly improved in the 25-45mph range.
If you like the looks of the Puig windshield, give my friends at CBXman a shout and tell them you want one like ScootDawg's. This shield is worth it's weight in gold and CbxMan will treat you right!
MRP Oko Performance Nitrogen Shocks
These shocks are adjustable by length, spring tension and the dampening can be adjusted by adding or removing air. It took a little time to get these babies adjusted right but once the sweet spot was found....WOW....what a difference. These shocks really smoothed out all the little bumps that used to vibrate my teeth out. The reason it took a while to find the sweet spot as that the sweet spot is the furthest extension of the springs as possible and no air added. My only criticism of these shocks is that the springs could be a little lighter weight. If the springs were a little lighter, one might be able to find an even sweeter spot. I should mention that if you have a heavier bike or the rider is over 200 lbs. More tension and/or air might work. Overall, if you ride rough roads or a lot of miles, these shocks are well worth the investment.
Authorized Online MRP Dealers
