XV920RH's, RJ's and TR1's
The yellow flat tracker style is so nice. I raced a XV920RH in BOTT for a few years in the '80's. I remember how funny is was to push that lead sled through the Camel Pro race tech guys. They always got a laugh about the weight. So getting those cast spiral wheels off would save a ton. You can slide the triple trees down the stock fork tubes about 1.25" to add a little quick to the steering. Pull the rubber caps off because you will getting a little tight. The hot shoe carb was del Orto pumpers for carbs at the time. The rear swing arm weighs a ton and I think there were some off label options from the yz's and tz's just prior that would help. Sorry... I don't remember the year and model. Yamaha was trying to put together a Jimmy Felice flat track effort, I think Mert Lawell was involved too, and they put together some chain drive 750 engine combos for the effort. I think Axtell was involved. So after they abandoned the effort they were selling the remainder off through Cycle News in like 1983 or '84. The flat tracker was interesting but they put so much adjustability into the frame that they might still be working though set up formulas. Plenty of power. Some of the photos show removal of the two piece engine crank cover. You'll see the viewing glass (Yamaha liked doing this on stuff around that time) and the center hex cap cover in the middle is a match for the inspection cover on the enclosed chain. One is silver and one is black for a cheap accent. This system was nice on the street but weighs a total ton. Remember no O ring chain if you keep the enclosed system. You can run with the system "open" and use chain lube, but the chain will clang like a bell against the housing if you don't keep the rubber boots on. I see a lot of the folks keep the little plastic "spoiler" above the front cylinder. It really did nothing and if you pull it and run bigger coils, it will keep them cooler. Remember to kep your plug wires equal length. The rubber bellow on the stock carbs, generally the back, will sometimes suck in and allow air leaks. Watch them... and drill/pick out the covers on your stock carbs to be less lean... they were factory sealed and easy to overlook. You can swiss cheese the air box and keep the filter, but ya gotta do sumthin with that air horm/rubber velocity stack. The RH's were cherry red (82's) and the RJ's were silver and black (83's). I see Chris Steward mentioned. He rode the '83 in BOTT production and Yamaha had some contingency money in '83. A west coast ghost... you'd see him at the start and the finish. The shock has a remote rebound (I think I remember) adjust on the frame. Also weighs a ton and the cables stretch. That stock also had air preload. Dump it and buy something that reflects what weight changes and riding you'll do. The earlier YZ parts bin or aftermarket was the way to go. The lock and chain weighed a ton as did the nearly useless rear fender (it mounted to the swing arm to add more unsprung weight!) I would lose them and the lock box behind the seat. That unbolts with two screws and then reposition the tail light. The grab rail is an easy removal, it takes the '80 goofy look away and drops another ton of weight. The 2:1 exhaust is such a good idea, but it did look bulky and bulbous. You can punch out the baffle, but as old as these are now, let is rest and switch the system out. You need the fork brace and update the brakes. The stock fender is heavy up front too.The rotors are a solid as a rock... at least have them patterned. The rear drum is in need of some holes to lighten things up. I saw one of the bikes with drill outs on the foot peg frames. They are heavy. Raask made rear sets for it, but I didn't like the quality or the positioning. I liked the stock location... just a little higher. I ran it with clubman bars and clip ons. It is a big tank to reach through with clip ons. I had two RH's. One track, one street. Loved those big horses. The era was a good one to hair dryer heat the gold plastic medallions off the tank and side covers. Speaking of starters, the TR1, europe and Canada, too, had 980cc bore and was a easy upgrade, and I think the marbles in a can starter was better. This was improved on the later year (through the 80's at least) Viragos in the states, too. Speaking of weight, that is quite a battery, too. Right out of a Mack truck. This has to be replaced with a smaller 12 volts... my gosh it is huge!
Zippydapanhead screwed with this post 04-12-2011 at 10:15 PM