Crankshaft lightening and balancing? [Archive]

Grumph

13th July 2014, 07:36

Someone in the NI is doing very nice work - I've had an R1 and FZR600 through here both with cranks that were works of art.....

The R1 was a sidecar motor so someone in that crowd may know. I'd like to know who did them too.

If it's another GSXR Mr Smith, I wouldn't lighten it, set them up properly and you get a lot of wheelspin, lighter crank just makes it harder to control - without electronics......

Kickaha

13th July 2014, 09:01

The R1 was a sidecar motor so someone in that crowd may know. I'd like to know who did them too.

Speedway sidecar?

Someone who will remain nameless but used to do motorcycle exhausts had a crank done copying one of the Klaffi cranks out of one of his broken motors you could always ask him for his expert advice, although going by how long his engines last it was probably done at home with an angle grinder

Not something that Barry,Denco or Proturn would to?

neil_cb125t

13th July 2014, 09:50

neil_cb125t

13th July 2014, 09:55

Ask for paul - tell him Chappy sent you

:-0

Grumph

13th July 2014, 10:10

Speedway sidecar?

Someone who will remain nameless but used to do motorcycle exhausts had a crank done copying one of the Klaffi cranks out of one of his broken motors you could always ask him for his expert advice, although going by how long his engines last it was probably done at home with an angle grinder

Not something that Barry,Denco or Proturn would to?

No roadrace - one of Bill's cranks. Bob D can do a very good job knife edging and lightening but the balancing then goes out to be done.

Given where Bill's R1 motors came from, I'm picking someone in the upper NI who probably does more car than bike stuff...but I'm guessing.

Kickaha

13th July 2014, 10:22

No roadrace - one of Bill's cranks. Bob D can do a very good job knife edging and lightening but the balancing then goes out to be done.

Given where Bill's R1 motors came from, I'm picking someone in the upper NI who probably does more car than bike stuff...but I'm guessing.

Bill Newton? I think those were motors out of the UK from when the Pirate owned it

Drew

13th July 2014, 10:33

Bill Newton? I think those were motors out of the UK from when the Pirate owned it

I thought Bill had it Thunderace powered?

Kickaha

13th July 2014, 12:02

I thought Bill had it Thunderace powered?

It was, but I can't think of any other Bill running a road sidecar

I have had all my crank work done by collier motor engineers in Levin, VERY good at what they do..... they have done my 4 and 2 banger cranks, also they are pretty affordable.
What do you consider "pretty affordable" ?

Grumph

13th July 2014, 16:58

I thought Bill had it Thunderace powered?

Yeah, sorry it probably was a thunderace, i was assessing used bits though so plead old age and confusion...

I'd thought from what i was told at the time that the motors were built in NZ, but Warwick may well be right.
So I'm left with the FZR600 which was definitely done in NZ - but no one can tell me who did it....

Grumph

13th July 2014, 17:03

I have had all my crank work done by collier motor engineers in Levin, VERY good at what they do..... they have done my 4 and 2 banger cranks, also they are pretty affordable.

This was the work they did to my ER crank........2.2kgs they took off........

That's mainly just lightening - the ones i had here had the webs shaped too - knife edged front and rear. It's a hand work job which is best done by someone with experience. I've talked to Bob Densem (Denco) who freely admits he's still learning how the shapes affect oil around the crank - after many years of doing it too....

Peter Smith

13th July 2014, 19:17

Ask for paul - tell him Chappy sent you

:-0

Will do. 2.2kg is heaps, I was looking at only 1.3 - 1.4 kg.
Thanks Chappy

neil_cb125t

13th July 2014, 19:32

roogazza

14th July 2014, 09:38

Peter Smith

14th July 2014, 13:29

I have had all my crank work done by collier motor engineers in Levin, VERY good at what they do..... they have done my 4 and 2 banger cranks, also they are pretty affordable.

This was the work they did to my ER crank........2.2kgs they took off........

Yes agree there, Colliers did my Bandit crank few years ago now.
Didn't get a lot off Pete,but polished,balanced and crack test.

Did either of you have issues with main bearing failures?
One company has told me they have done several GSXR1100/Bandit1200 cranks which suffered main bearing failures after lightening the cranks, something to do with harmonics.

Grumph

14th July 2014, 15:19

Did either of you have issues with main bearing failures?
One company has told me they have done several GSXR1100/Bandit1200 cranks which suffered main bearing failures after lightening the cranks, something to do with harmonics.

Don't have to lighten them to get that...The speedway Modified mini sprints which used the GSXR1100 oil cooled motors were a byword for main failures and crank breakages. There's a critical torsional resonance in those cranks which coincided with the rev band the speedway motors worked in. Removing the starter clutch helps as it raises the critical resonance rpm...but we couldn't do that on the speedway cars as they had to self start...The 750 TQ's never suffered from this but I had a very sensitive and successful customer who wanted the starter cluch left on for better throttle control.
Back in the day, Peter, Holden told us that he'd ridden an Aussie 1100 with a light crank - and didn't like it at all. Ours was stock. Only probs we had were odd wear patterns on the end mains which we ID'd as the cases flexing...Robert again...

Peter Smith

14th July 2014, 16:18

Don't have to lighten them to get that...The speedway Modified mini sprints which used the GSXR1100 oil cooled motors were a byword for main failures and crank breakages. There's a critical torsional resonance in those cranks which coincided with the rev band the speedway motors worked in. Removing the starter clutch helps as it raises the critical resonance rpm...but we couldn't do that on the speedway cars as they had to self start...The 750 TQ's never suffered from this but I had a very sensitive and successful customer who wanted the starter cluch left on for better throttle control.
Back in the day, Peter, Holden told us that he'd ridden an Aussie 1100 with a light crank - and didn't like it at all. Ours was stock. Only probs we had were odd wear patterns on the end mains which we ID'd as the cases flexing...Robert again...

Cheers Mate,
Jay from APE Racing says the 1127 cranks are renouned for breaking around the journals. The 1052 and Bandit 1200 are fine.
Thanks for the feedback, much apreciated.

roogazza

14th July 2014, 20:29

Did either of you have issues with main bearing failures?
One company has told me they have done several GSXR1100/Bandit1200 cranks which suffered main bearing failures after lightening the cranks, something to do with harmonics.
Sorry for the delay there,gardening you know,retirement is a bastard.
No ,no failure on mine at least,but I kept modest rev limits on a fairly mild state of tune. It was a beaut motor tho and a friend has since gone quite mad with it in sleeved 1340 spec.yoshi stage 2 cams. Still no probs which maybe because there's no need to rev the shit out of it.
Or maybe the crank work/care helped, dunno? It was supposed to.
He went the big valve way too, studs kits ,the lot. Love to buy it back.
Make a great pre 89 shhhhhh ! just joshin ! :innocent:

Fast Eddie

25th July 2014, 18:02

Someone in the NI is doing very nice work - I've had an R1 and FZR600 through here both with cranks that were works of art.....

The R1 was a sidecar motor so someone in that crowd may know. I'd like to know who did them too.

Do you have the old FZR1000 that was in my Windle then Grumph? Is it rebuildable?

Waddya doing with the FZR600?

Grumph

25th July 2014, 20:21

Do you have the old FZR1000 that was in my Windle then Grumph? Is it rebuildable?

No - and no idea. think it had done a big end - ask Bill what happened to everything.

Waddya doing with the FZR600?

Nothing - the owner sold it as he is having fun with his GS1000 against pre 89's...it's down your way now but hasn't been seen out at all i understand. Pity as we'd won pre 89 at Wyndham 3 times in a row....it's a good'un.

Fast Eddie

27th July 2014, 10:19

Nothing - the owner sold it as he is having fun with his GS1000 against pre 89's...it's down your way now but hasn't been seen out at all i understand. Pity as we'd won pre 89 at Wyndham 3 times in a row....it's a good'un.

Bill sold it all with the Windle sidecar to a fella named Grant who was a speedway guy. That fella blew the fancy fzr1000 up and put it aside and fitted the r1 which it has now. When the windle was sold to fella named Dave up north - the FZR didn't go with it.. What happened to it I'm not sure - Grant never returned calls or messages. I heard it made its way to another fella named Bevan in ChCh and then was sold again to someone else..

It was a bloody quick motor - The windle used to catch up to the agip bike like it was in reverse.. At the moment the agip bike pulls away from the windle down a straight :(

Kickaha

27th July 2014, 10:24

Bill sold it all with the Windle sidecar to a fella named Grant who was a speedway guy. That fella blew the fancy fzr1000 up and put it aside and fitted the r1 which it has now. When the windle was sold to fella named Dave up north - the FZR didn't go with it.. What happened to it I'm not sure - Grant never returned calls or messages. I heard it made its way to another fella named Bevan in ChCh and then was sold again to someone else..

It was a bloody quick motor - The windle used to catch up to the agip bike like it was in reverse.. At the moment the agip bike pulls away from the windle down a straight :(
It most likely would have been fucked anyway, didn't it put a rod out the front of it?

Grumph

27th July 2014, 13:51

Bill sold it all with the Windle sidecar to a fella named Grant who was a speedway guy. That fella blew the fancy fzr1000 up and put it aside and fitted the r1 which it has now. When the windle was sold to fella named Dave up north - the FZR didn't go with it.. What happened to it I'm not sure - Grant never returned calls or messages. I heard it made its way to another fella named Bevan in ChCh and then was sold again to someone else..

It was a bloody quick motor - The windle used to catch up to the agip bike like it was in reverse.. At the moment the agip bike pulls away from the windle down a straight :(

The Bevan would be Bevan Nuttridge, another speedway guy in ChCh - and i've been waiting 18 months for him to get back to me about a GS1000 motor on the coast which he wanted to sell. Allegedly in a mates storage container with other motors.....

Kai if you want to chase him up, he works for City South Van spares in ChCh....hope you have better luck than me.

jellywrestler

27th July 2014, 14:16

- and i've been waiting 18 months for him to get back to me about a GS1000 motor on the coast which he wanted to sell. Allegedly in a mates storage container with other motors.....

.

it could be this little sweetheart.....

http://www.trademe.co.nz/Browse/Listing.aspx?id=756623366

Fast Eddie

27th July 2014, 17:12

It most likely would have been fucked anyway, didn't it put a rod out the front of it?

yea it probably was fubar

Fast Eddie

27th July 2014, 17:14

Kai if you want to chase him up, he works for City South Van spares in ChCh....hope you have better luck than me.

Cheers, Yea I tried to chase him up for the motor like 2 years ago now when I was still running the agip bike to try get FZR bits for that.. But meh - running R1 in the windle now so not that fussed. The good bits it had from when it came from the UK are probably long gone anyway

Grumph

27th July 2014, 17:45

it could be this little sweetheart.....

http://www.trademe.co.nz/Browse/Listing.aspx?id=756623366

that is a gem...Nah, west coast SI I meant.

Wonder where all the GSX1100's with one 750 piston have gone ? I did at least three for speedway chairs.