Crank rebuild recommendations and Hi

maccas · Post by **maccas** » Thu Feb 28, 2013 12:03 am

I've seen that kr1 on ebay before. Stands out with the white frame.

I used grampian for my crank rebuild. Came to 330 quid all in with a new centre shaft from bdk. Very good service!

I could move the flywheel up and down on my crank when it was rumbling. Mine was pretty badly gone though.

Dan

JanBros · Post by **JanBros** » Thu Feb 28, 2013 12:24 am

Gazjen wrote:I've removed the top end and cannot immediately see/feel anything wrong with the crank but this noise is still bothering me

Can you guys have a listen to this please and see what you think? It does sound worse on the video though.

http://youtu.be/7WprNCPaizA

sounds to me like clutch-rattle.

does it go away with a bit of revs or when you pull the clutch ? if so, learn to except it

Gazjen · Post by **Gazjen** » Thu Feb 28, 2013 1:04 am

No it doesn't change at all with the clutch

JanBros · Post by **JanBros** » Thu Feb 28, 2013 1:28 am

Gazjen wrote:No it doesn't change at all with the clutch

and revving ?

dave32 · Post by **dave32** » Thu Feb 28, 2013 12:57 pm

Its definitely NOT the crank,if it was a main bearing on its way out you would feel vibration through the bars and pegs when revving it,if it was the big end well they normally just let go through oil starvation.
Still sounds like its coming from the clutch area,got decent/enough gear oil?
be worth taking the cover off and checking the clutch.

Gazjen · Post by **Gazjen** » Fri Mar 01, 2013 12:55 am

Well I've removed the engine today and stripped it and cannot find anything wrong all bearings feel/look fine so I'm at a loss now, probably just going to rebuild it and ride it

I thought they just took a std 10-40w motor oil for the gearbox. Is there a better one to use?

Luders · Post by **Luders** » Fri Mar 01, 2013 6:20 am

It needs to be gear oil or dexron. You have a wet clutch which is reliant on the oil. Standard motor oil will knacker your clutch friction plates..

JanBros · Post by **JanBros** » Fri Mar 01, 2013 8:19 am

Luders wrote:It needs to be gear oil or dexron. You have a wet clutch which is reliant on the oil. Standard motor oil will knacker your clutch friction plates..

manual says standard 10W40, but off course bike-engine-oil and not car-oil

I just put ATF in mine.

375 · Post by **375** » Fri Mar 01, 2013 8:37 am

Have a look at the gear that is on the back of the clutch basket and associated gears and check that none of the teeth are chipped,

When my lc engine was rebuilt it had this and the top edge of the teeth should be flat (not sure on a kr) but three of them in a row were pointy and two had very small chips, it sounded like the engine was knackered

Something is making that noise,
Just a thought,

Luders · Post by **Luders** » Fri Mar 01, 2013 9:05 am

JanBros wrote:I just put ATF in mine.

Just in case you're unfamiliar with this acronym, it's Automatic Transmission Fluid, also known as Dexron.

Check those teeth as Paul has suggested too.

Gazjen · Post by **Gazjen** » Fri Mar 01, 2013 6:57 pm

Cheers guys will have a look at the clutch basket. I don't like mysteries.

martin · Post by **martin** » Fri Mar 01, 2013 7:21 pm

I remember that bike. i bought a bike off the guy.
was it spenser barrows, or something like that.
he has 2 massive dogs,
am pleased for you it is,nt the crank, they are expensive to rebuild. just had two rebuilt at bdk. both rebuilt with new centre shafts £700

dirk · Post by **dirk** » Fri Mar 01, 2013 9:03 pm

Hi Folks

JanBros wrote:
Gazjen wrote:I've removed the top end and cannot immediately see/feel anything wrong with the crank but this noise is still bothering me

Can you guys have a listen to this please and see what you think? It does sound worse on the video though.

http://youtu.be/7WprNCPaizA
sounds to me like clutch-rattle.
....

I also believe it is the clutch.
my KR sounds as if i had a dry clutch.

especially with the engine cold.
I think always the engine is broken.
what the heck ... it's a KR!

i use Motul Transoil Expert.

regards

Dirk

Gazjen · Post by **Gazjen** » Fri Mar 01, 2013 9:44 pm

That's the chap, although he only had one dog when I went and was down to one bike when I left. What did you buy off him?

I don't mind paying out for things if I've proved it's at fault, as I said I don't like mysteries.

martin · Post by **martin** » Fri Mar 01, 2013 9:48 pm

I bought a black/green kr1s. ended up stripping it as it needed loads doing.
I don't think the guy knew much about fixing bikes.
did you get the bike for a good price