I just picked up my first bike a few weeks ago. It is an '03 WR450 that has been plated by a previous owner. I have put about 150mi of road and forest road on the bike and am having a blast so far. I have a few questions trying to figure out what exactly is on this bike. Newb questions as this is my first motorcycle.
For backround I have been tinkering with cars ('87 Camaro) for the last 15yrs. I am confident it mechanical work and DC electrical. I don't quite yet understand what is AC vs DC on the bike and how it affects what I would like to change on the bike.
I am also an avid mountain biker so I am excited to get this bike on some single track.
First of all the bike, went for a ride to Spada Lake in WA.
Now, first of all, some questions about the street legal kit on this bike. Anyone know what I have here? The headlight surround plastic looks similar to stock but it is missing the lower "chin". Some more info. There is an independent switch on the cental handle bar that allows me to turn off the headlight. This seems pointless to me. Any reason why I shouldn't just remove the switch and have the headlight on any time the key is on? Also, the light swich by the left grip seems to only control the rear light. Off leaves the tail light off all the time. P and H seems to have identical functionality where the rear light is on when the key is on. I would really like to tie the headlight and taillight to the key and remove some unnecessary switches. Good idea or not? The off/P/H selector is missing the decorative slider, anywhere I can get this? The hi beam / low beam switch seems to do nothing. The previous owner told me the headlight is setup for a high beam but he took it out because it drained the battery. I would like to restore the hi beam. All four turn signals seem to work properly. The rear turn signals are built into the taillight.
The brake light is only tied to the rear brake. I would like to wire it so either the front or rear brake will trip the brake light.
I added a Trail Tech Vapor dash. Speed and temp seem to work well but the tach is spotty. What should the idle rpm be on this bike?
The previous owner told me the exhaust is a GYTR. He also gave me the restrictor (pipe organ?) that he removed from the muffler. Exhaust is super loud, but I think I am ok with that. Anything I should know? The head pipe has 1 small and 1 medium sized dent. Will this have any effect on performance?
I found that riding the bike on the road I had a stumble at constant throttle. After doing some research, I unplugged the TPS and that seemed to solve the problem. I also disconnected the gray wire. I will shorten the throttle stop next.
Starting the bike is interesting. It starts super easy with the kickstarter. However I seem to have an issue with the electric starter. About 1/3 to 1/2 the time the starter will not turn over the engine at all. It is like the piston is in a certain position that the starter cannot overcome. The other 2/3 to 1/2 time the bike fires up in less than a second.
When cruising and suddenly ripping the throttle I get a bit of a hesitation. It sounds like that may be the calibration of the accelerator pump shot. I will look at that soon.
The clutch and brake levers have ugly blue inserts and have quite a bit of up and down play. The brake lever is a little crunchy. I would like to swap these out. It looks like the levers are pretty universal. Anything I should know? Looks like I would need a clutch lever with hot start mounting.
The grips on the bike are pretty well shot. I attempted to replace them with ODI Rogue lock on. I have these on my mountain bike and like them. Left side went on with no issue. However the throttle side had some issues. The ODI throttle cam appears to be too narrow and the diameter is too large. This is using throttle cam A. The throttle would not return to idle quickly with this throttle cam. Also, the grip had way too much side to side play. My plan is to use the glue on ODI Rogue grip on the throttle side with the OEM throttle tube.
Can anyone tell me what the excess electrical capacity is like on this bike? I would like to add a charger for my mobile phone. I use the phone for navigation. Would an extra 1.4amps be ok? The Trail Tech Vapor has a 0.5amp fuse on it.
Mods the bike came with:
Street legal mods (key, turn signals, different tail light, ignition button)
GYTR exhaust (restrictor removed)
Devol frame and radiator guards
Mods I have done:
Trail Tech Vapor
phone mount (gps)
I know that is a million questions. But any information will help. Thanks.