Kinda new here and to 4T's, but I have a question regarding my '03 WR450's chain/drive. I bought the bike used this summer and have only ridden it a few times.
At the end of the day riding through some pretty tight and hilly woods in NC, I was heading back on a 4x4 trail - probably getting towards WOT in 3rd when the chain let go. Fortunately, it wadded under the front chain guard and below the gear shift lever. The motor cut off immediately. I was able to go through the gears to get back to Neutral and backed the chain off the rear sprocket. I started the bike, and it sounded fine.
No leaks or visible damage (except some scrapes on the casing), and it looks like the master-link clip must've popped off at some point.
So many bad things could have happened, that I feel blessed with the hand I was dealt. There might be some internal damage, but I really won't know until I get a chain back on there.
The chain has a slight twist in one spot, and I don't want to mess with it.
I checked my owner's manual for the exact OEM chain type/size. It shows "Chain = DID520VM/DAIDO".
I'm guessing that any quality 520 O-Ring chain will work. However, now would be a good time to update/change my sprockets. Since I ride mostly pinewoods and mountain trails in 2nd/3rd gear, I might want to gear it down for a little more bite/higher RPM's in 2nd, maybe a 14/51. I currently run a 14/50.
I was looking online (Bike Bandit) this morning for a replacement drive setup, and I came across this as a direct replacement:
Chain Included RK GB 520 MXZ3
Chain Color Gold
Ring Type None
Sprocket Color Black
Sprocket Teeth 14 Front / 50 Rear
I don't know anything about RK. I'll listen to any reasonable suggestions to match my riding (I'm a novice rider) and terrain (mostly woods) for a good drive setup for my '03 WR450.
Edited by ack1961, November 28, 2011 - 08:11 AM.