This is my project Blaster. My stepdaughter and nephew ride it. It is a 1991 Blaster. I purchased it from a friend for $400. It needed a new topend and crank rebuilt. My goal is to build a quad that is fun to ride,reliable, look good,but not be afraid to ride it. I don't want to spend more than the price of a new Blaster. So that means I wiil probably have to do alot of the work myself. I also will use some cheaper parts. I would also like to try some new parts that are untested. So I will have some polls and let the viewers decide on some of the mods. Click here too see more pictures of the Blaster |
Here is a list of mods and how much they cost. Some of the costs I rounded up, and i didn't keep all the receipts, so I had to guess on some of them.
| 1991 Yamaha Blaster | $400 |
|
Ritter Cycle crank rebuid |
$120 |
| Ritter Cycle Bore Cylinder | $90 |
| Ritter Cycle mill head | $30 |
| Wisecoe Piston & Rings .20 over |
$84 |
| Gasket and seal set | $56 |
| CPW 28mm carb from Ebay | $100 |
| Carbon Flex 2-stage Reed Petals from Vito's | $30 |
| Intake Manifold from Vito's | $90 |
| Vito's Reed Spacer | $24 |
| Vito's Degree key | $20 |
| K&N clamp on Air Filter from Vito's and Outerwear | $55 |
| Race Logic Porting Template | $90 |
| Stainless steel hex cap screws for clutch cover and stator cover | $16 |
| Grooved kevlar brake pads and shoes from Vesrah | $50 |
| Motion Pro shorty brake cable | $32 |
| Total | $1287 |
Engine
When I got the Blaster the engine was in a box. So I sent the crank,cylinder, and head to RCR. He rebuilt the crank, bored the cylinder, and milled the head. I bought a race logic porting template, it cost $90. I didn't want to spend $200 plus for porting, and didn't have time to map the ports and figure out the porting myself. To bad I didn't have this site when I did the porting, I would have took some pictures. I also added a K&N clampon air filter. I don't like this set up since we ride in the water. So I might build a aluminum airbox. I will probably model it after the stock 250r box. So they will interchange with both. I will also incorporate the taillights in it. I will probably run a dualstage foam filter. Anyways with the milled head, porting, degree key, two stage reeds, reed spacer, 28mm carb, this Blaster has excellent throttle response, tremendous low end torque, and a good mid-range power. The stock exhaust is restrictive on the top end. Overall I'm pleased with the mods so far. I can't say how much of a improvement the mods have made, since it wasn't running when I got it. I would like to add a aftermarket exhaust next.We ride it the most at our farm which has a flat track and drag strip. We go to Chadwick a few times a year. We also go to Little Sahara once a year. So I want to keep the low end power and improve the top end a little. So feel free to cast your vote about which pipe to use. This isn't a contest about which pipe is the best. There's discussion in every forum about it, and there isn't a best pipe. Some are good for MX, and some are good for woods riding. It also depends on the rider and sometimes on the budget. Anyways cast your vote for the pipe you curious about. They are all priced relatively close together so don't worry about price. I don't have access to a dyno, but will do some runs on the drag strip with the different pipes. I will also record the different top speeds.