Newbie bike issues

New to the forum? Then say hello here
Post Reply
Wileboma
Lurker
Posts: 7
Joined: Sun Sep 02, 2018 5:16 pm
Bike Make & Model: Yamaha R6 5EB
Has thanked: 0
Been thanked: 0

Newbie bike issues

Post by Wileboma »

Hi all
Thanks for allowing me on here.
I’ve got a 2000 R6 which was an old Cat D write off. I’m trying to get it back on the road but it’s got a knocking from the top of the engine. I’ve spoke to the guy I bought it off and apart from a slight ticking the engine was fine. I’ve not fiddled with the engine at all, only cleaned the carbs etc.
The engine sounds fine at idle, but as soon as you give it any revs it starts knocking, then dies down again.
Any ideas?

Thanks


User avatar
polar
Donator
Donator
Posts: 2642
Joined: Thu Dec 14, 2017 7:48 am
Bike Make & Model: FJR 1300, MT10SP
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by polar »

Hi mate and welcome to the forum

I wonder if the cam chain tensioner had stuck whilst it been standing and the cam chain is slapping the casing?
Do you have an exhaust port seal leaking?
Other than that you need to take the cam cover off and check the valves for height and go from there
Wileboma
Lurker
Posts: 7
Joined: Sun Sep 02, 2018 5:16 pm
Bike Make & Model: Yamaha R6 5EB
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Wileboma »

Thanks for that. I was looking at it earlier and the tensioner seems to be working fine. I think I will take you advice and have a look at the valves.
Aj2012
Been here too long
Posts: 259
Joined: Thu Oct 12, 2017 4:58 pm
Bike Make & Model: YZF R1M
Location: Spain
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Aj2012 »

When you say dies down again do you mean the engine dies down or the knocking dies down when you get to idle?

Is it 100% at the top I.E where carbs are? Or nearer the front where the plugs/manifolds are?

What work have you done so far? Did it run when you got it or is this the first time you have run it?


Sent from my iPhone using Tapatalk
User avatar
jompy
Moderator
Moderator
Posts: 19692
Joined: Wed Jul 03, 2013 8:24 pm
Bike Make & Model: 98 4xv Half-One
Location: Derby
Has thanked: 46 times
Been thanked: 38 times

Re: Newbie bike issues

Post by jompy »

Welcome in Mark
Hope you get the R6 sorted nd enjoy the forum
Wileboma
Lurker
Posts: 7
Joined: Sun Sep 02, 2018 5:16 pm
Bike Make & Model: Yamaha R6 5EB
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Wileboma »

Hi,
I tried to run it once before and it was knocking then but had fuel issues, so I stripped the carbs, I was told the knocking could have had something to do with poor fuelling but this is the first time I’ve ran it since then. The guy who had it before me just mentioned the slight tapping, which is why he changed the chain tensioner.
I,ve not done anything to the engine since I’ve had it. Then knocking could be from the front as AJ said. It’s just winding me up because I’ve not touched the engine.
Wileboma
Lurker
Posts: 7
Joined: Sun Sep 02, 2018 5:16 pm
Bike Make & Model: Yamaha R6 5EB
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Wileboma »

Sorry I forgot to mention, the engine seems to run fine although it will run for a while then cut out, but it will start up again without a problem. Like I said the knocking only starts above about 1000 rpm, below that it’s fine.
User avatar
Moise
Donator
Donator
Posts: 8889
Joined: Wed Jul 09, 2014 8:19 am
Bike Make & Model: Yamaha R1 4xv
Location: Auckland, New Zealand
Has thanked: 59 times
Been thanked: 59 times

Re: Newbie bike issues

Post by Moise »

I've just seen the scary phrase "changed the tensioner". Was the engine OK afterwards?
"You don't get slower with age, you just get more cautious." Michael Rutter

1999 4xv in blue
Wileboma
Lurker
Posts: 7
Joined: Sun Sep 02, 2018 5:16 pm
Bike Make & Model: Yamaha R6 5EB
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Wileboma »

Hi Moise.
That’s half the problem, I don’t know if it was ok after he changed it, I’m not sure if he ran it or not. He’s a mate so he knows about the problem but didn’t go into too much detail, I’ll ask him again.
User avatar
Moise
Donator
Donator
Posts: 8889
Joined: Wed Jul 09, 2014 8:19 am
Bike Make & Model: Yamaha R1 4xv
Location: Auckland, New Zealand
Has thanked: 59 times
Been thanked: 59 times

Re: Newbie bike issues

Post by Moise »

Good luck. If there are any doubts, a check of the valve timing might be worthwhile.
"You don't get slower with age, you just get more cautious." Michael Rutter

1999 4xv in blue
Wileboma
Lurker
Posts: 7
Joined: Sun Sep 02, 2018 5:16 pm
Bike Make & Model: Yamaha R6 5EB
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Wileboma »

Thanks one and all, I’ll get it stripped and see what I find, hopefully nothing too serious.
Aj2012
Been here too long
Posts: 259
Joined: Thu Oct 12, 2017 4:58 pm
Bike Make & Model: YZF R1M
Location: Spain
Has thanked: 0
Been thanked: 0

Re: Newbie bike issues

Post by Aj2012 »

Timing is a good place to start as the bike may be igniting the fuel to early (before the pistons reach TDC) that will cause a engine rattle on acceleration, if the timing chain tensioner has been replaced I would double check everything was set correctly again afterwards.

Keep us updated fella and good luck.


Sent from my iPhone using Tapatalk
Post Reply