possible problems with the 07 450

hey guys. i was out riding yesterday when i came across some things that i found weird.. first off there is a sound comming from my right side of my engine.. i really dont know what it is but it sounds like its clutch related cause when i pull in my clutch it goes away and when i let it out it gets loud. what could this be? or is this normal.. the bike has around 5-10 hours on it. i also know that i need to adjust my valves cause its getting hard to start. im thinking about taking my bike in for a complete overhaul on the engine(adjust the valves,clutch, and anything else that isant in spec with factory) if i cant figure out whats wrong.

thanks

josh

hey guys. i was out riding yesterday when i came across some things that i found weird.. first off there is a sound comming from my right side of my engine.. i really dont know what it is but it sounds like its clutch related cause when i pull in my clutch it goes away and when i let it out it gets loud. what could this be? or is this normal.. the bike has around 5-10 hours on it. i also know that i need to adjust my valves cause its getting hard to start. im thinking about taking my bike in for a complete overhaul on the engine(adjust the valves,clutch, and anything else that isant in spec with factory) if i cant figure out whats wrong.

thanks

josh

My clutch does the same thing, as far as the valves, mine starts on the first kick usually when cold.

It's normal:

http://www.thumpertalk.com/forum/showthread.php?p=3204462#post3204462

If it has no more than 5-10 hours on it, it certainly doesn't need the valves adjusted. But you can check that yourself easily enough, even if you don't feel competent to actually adjust the valves.

Hard starting can come from a partially fouled plug, or just from a change in the weather. Try adjusting the pilot screw for your current conditions.

07 manual does suggest checking valve clearence after break in and 10 hours afterwards... mine was tight and I've made adjustments... just my 2 cents.

It's normal:

http://www.thumpertalk.com/forum/showthread.php?p=3204462#post3204462

If it has no more than 5-10 hours on it, it certainly doesn't need the valves adjusted. But you can check that yourself easily enough, even if you don't feel competent to actually adjust the valves.

Hard starting can come from a partially fouled plug, or just from a change in the weather. Try adjusting the pilot screw for your current conditions.

My exhaust valves were also tight at 10hrs. I would suggest to check them. Very easy to do.

okay guys. yeah i planned on checking them this week. i just was really concerned about the sounds comming from my clutch. got me worried there for a min. im also changing the plug cause i think its fouling out... i plan on checking the valves later on this week when i have some free time. anything else i should do while im doing some maintence?

thanks

josh

If you recently installed a skid plate that will make it sound like the clutch is loud.

in fact i did just install a factory gytr skid plate.. before i took my bike out yesterday... which makes since.

josh

Same thing happened to me when I bought my 06. I put on a works connection skid plate, loaded up and went to the track. I rode one lap and pulled back in. It sounded almost like the clutch or main bearings were bad. Then I remembered the skid plate and took it back off. The noise magically disappeared.

Something about the skid plate on the 06 & 07's magnifies the engine noise. You can stuff some foam between the skid plate and the engine and that helps quiet it down but still will be a little louder than stock.

thanks. ill stick the factory foam yamaha sent me with my skid plate in tomarrow.. and see how much a diff that makes.

thanks agian everyone

Ive got similar noise from mine and wouldnt worry about it.

I have however heard another noise which sounds more apparant on tick over? Is it something to with auto decompressor? Valves are fine exhaust is on .20 spec is this normal?

The YZF valve train is noisy, and no attempt has been made to make it any quieter, since it wouldn't go any faster, or be any more reliable if it were quieter.

The best bet, if you're suspicious, is to compare with a few like motorcycles.

Thanks for the response.

There are very little yzf's near me so cant listen, but the noise seems to be very apparant on start up, what else could it be if it wasnt just noisey valve train????

it was the spark plug that was causing my problems.. changed and fired first kick.. 5 bucks and 10 mins time was worth it.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now