Posts
36
Joined
2/24/2018
Location
GB
Edited Date/Time
7/5/2018 2:20pm
Hi guys, on Sunday i picked myself up a crf450r. I was hoping i can have some light shed on what to do with it.
This bike had been used as run just riding down country lanes etc. But, i was told that a noise was coming from the clutch push rod. However i'm thinking to myself that it could be faulty main bearings (due to the close proximity) I've opened up the clutch already and the push rod looks fine. Does anyone have any experience with main bearings or suggestions for what else it could be, engine turns over, with lots of compression; but the last bike i rode was a kx100 bored to a 120, so easy to kick. I'm thinking of replacing everything? (e.g airfilter, oils, coolent etc)
it's also it's been over-bored to a 510
So like i said, i'm hesitant to run it as is, just in case of blowing the engine to bits. I'll see if i can get a video of me kicking it over (if anyone is interested) might help?
This bike had been used as run just riding down country lanes etc. But, i was told that a noise was coming from the clutch push rod. However i'm thinking to myself that it could be faulty main bearings (due to the close proximity) I've opened up the clutch already and the push rod looks fine. Does anyone have any experience with main bearings or suggestions for what else it could be, engine turns over, with lots of compression; but the last bike i rode was a kx100 bored to a 120, so easy to kick. I'm thinking of replacing everything? (e.g airfilter, oils, coolent etc)
it's also it's been over-bored to a 510
So like i said, i'm hesitant to run it as is, just in case of blowing the engine to bits. I'll see if i can get a video of me kicking it over (if anyone is interested) might help?
Alternatively you would need to tear down the top end and actually feel for play in the crank.
Also the cam chain when worn will do the same thing. This can be checked by checking the cam timing marks to be sure they line up and making sure the chain has good tension on it.
The crank bearings were fairly bullet proof, but like everything they will wear also. They can be checked for wear by grabbing each end of the crank and attempting to wiggle it to see if there is any play.
If the piston is worn it will also make noise.
The best bet is to check it all out prior to venturing out on it.
Any idea on how many hours on the engine?
Paw Paw
Paw Paw
The Shop
WATCH VIDEO ABOVE
Video of the bike, anyone got any ideas
Paw Paw
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