Crankshaft lightening and balancing?

[Peter Smith]

Winter is here so it's time to build a new motor.
Does anyone know a reputable company in the north island who can lighten and balance a 4 cyl crankshaft?

[Grumph]

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]

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]

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........

[neil_cb125t]

Ask for paul - tell him Chappy sent you

:-0

[Grumph]

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]

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]

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]

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]

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]

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]

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]

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........

ER was around $700 - 4 cyl was less but they took way less of it

[roogazza]

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.

[Peter Smith]

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.