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08 Honda 420 es making noise in neutral

5216 Views 41 Replies 5 Participants Last post by  shadetree
I just got my 2008 Honda 420 es and in neutral it is making a grinding, rattling noise that increases in volume with increased RPM. Runs and drives great and shifts fine which makes me believe that the transmission and Top end of the motor must be functioning properly. If anyone has any ideas of what it may be or if you have had a similar problem please help me out. Thanks :grin:grin
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Read my last post again, please. I think you read it while I was editing the original post. LOL
Checked my valve clearances today and they were very loose, used your method and adjusted them. Just got this atv and dont know the history so hoping to valve adjustment will help. Starting it up tomorrow and will let you know how it goes. If it's no better will be checking out the clutch side of the motor. Thanks for the help guys:grin
please keep us posted !!!.
So adjusted my valves and noise is about the same so time to start taking the clutch side apart!!! Oil change on Display is off now. Lol have to drain it again
So adjusted my valves and noise is about the same so time to start taking the clutch side apart!!! Oil change on Display is off now. Lol have to drain it again
with it being an '08 ?, chances are,,,the cam chain is on its way out...lol. least your cam chain is only about 30 bucks ?, cam chain for a '99 is 145.00 retail..lol. ( no I did not pay that price ).
when you order a new cam chain, don't forget to get a front clutch cover gasket !.
Yes, it has about 6000km and I'm sure the cam chain has never been touched, might be time for a top end too. Can you buy a clutch cover gasket or do you just use Honda bond? Thanks
Yes, it has about 6000km and I'm sure the cam chain has never been touched, might be time for a top end too. Can you buy a clutch cover gasket or do you just use Honda bond? Thanks
you need a clutch cover gasket, please do not use hondabond or yamabond on the front clutch cover ! :).
Looked at the manual and it said to use a gasket maker, sealant. Also looked at a parts diagram and dont see a gasket available so is it just gasket maker then? Thanks
Looked at the manual and it said to use a gasket maker, sealant. Also looked at a parts diagram and dont see a gasket available so is it just gasket maker then? Thanks
fair enough, if no gasket is there to start with ?, then yes, you can use yamabond or hondabond. if there is a gasket anywhere ?, then replace with gasket.
Looks like there is no gasket but I'm sure this things been pulled apart before. Lol about to pull the clutch cover off so hopefully I see a stretched timing chain!!! :grin
Looks like there is no gasket but I'm sure this things been pulled apart before. Lol about to pull the clutch cover off so hopefully I see a stretched timing chain!!! :grin
i'm sure you will !..lol.
Looks like there is no gasket but I'm sure this things been pulled apart before. Lol about to pull the clutch cover off so hopefully I see a stretched timing chain!!! :grin
i'm sure you will !..lol.
Looks like I found the problem, but is the tensioner also bad? I included a video and it looks like it is moving it and out a little. It is just because it is maxed out? Here's a video. Thanks alot

Looks like there is no gasket but I'm sure this things been pulled apart before. Lol about to pull the clutch cover off so hopefully I see a stretched timing chain!!! :grin
i'm sure you will !..lol.
Looks like I found the problem, but is the tensioner also bad? I included a video and it looks like it is moving it and out a little. It is just because it is maxed out? Here's a video. Thanks alot

yep..chain is shot, and tensioner is not looking good either, replace both of them. oh, please dont crank it over like your doing without oil in the engine !..lol.
i'm sure you will !..lol.
Looks like I found the problem, but is the tensioner also bad? I included a video and it looks like it is moving it and out a little. It is just because it is maxed out? Here's a video. Thanks alot

yep..chain is shot, and tensioner is not looking good either, replace both of them. oh, please dont crank it over like your doing without oil in the engine !..lol.
Alright looks like I will be buying a OEM tensioner and chain then. So you think that's what's causing the ticking it sure seems like it and I know not to turn it over without oil but just got too excited that I found the problem. Lol
Looks like I found the problem, but is the tensioner also bad? I included a video and it looks like it is moving it and out a little. It is just because it is maxed out? Here's a video. Thanks alot

https://youtu.be/qTEikFD2zkc
yep..chain is shot, and tensioner is not looking good either, replace both of them. oh, please dont crank it over like your doing without oil in the engine !..lol.
Alright looks like I will be buying a OEM tensioner and chain then. So you think that's what's causing the ticking it sure seems like it and I know not to turn it over without oil but just got too excited that I found the problem. Lol
unless your valves are not adjusted right ?, then a new cam chain, and chain tensioner will solve your problem :).
matter of fact, after you install the new chain, and tensioner , go back and re-adjust the valves :).
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matter of fact, after you install the new chain, and tensioner , go back and re-adjust the valves :).

Oh, I adjusted those valves perfectly. But will for sure check them again after.Lol, looks like I need a clutch puller too and some Honda bond. Is that it or do you recommend anything else well I have it apart. Will obviously check all the clutch disk clearances as well. Thanks :grin:grin
matter of fact, after you install the new chain, and tensioner , go back and re-adjust the valves :).

Oh, I adjusted those valves perfectly. But will for sure check them again after.Lol, looks like I need a clutch puller too and some Honda bond. Is that it or do you recommend anything else well I have it apart. Will obviously check all the clutch disk clearances as well. Thanks :grin:grin
check the friction disk, clutch arms, replace if needed ?, yamabond/hondabond, clutch puller tool. cam chain, chain tensioner, air impact gun to zip the nuts off, 1/2 drive,27mm deep well impact socket to fit the clutch nuts. this should be all you need :).
Ok great ordering the parts now so will be updating you guys when they come in, and are installed in about 2 weeks!!!:grin:grin:|:grin
Ok great ordering the parts now so will be updating you guys when they come in, and are installed in about 2 weeks!!!:grin:grin:|:grin
good deal, yes..please keep this thread updated for future owners ! :).
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