Crankshaft assemblies

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Vinpg
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Joined: Wed Sep 13, 2017 7:35 pm

Re: Crankshaft assemblies

#31 Post by Vinpg » Sun Dec 24, 2017 3:36 am

On a stock stroke the rod is below the web there is no way it could hit the case, now the stroker crank needed a trenching to work, a lot of work

lasse2t
Posts: 104
Joined: Wed Nov 23, 2005 2:59 pm
Location: Sweden

Re: Crankshaft assemblies

#32 Post by lasse2t » Sun Dec 24, 2017 9:27 am

Will also be interrested in 1 set of cranks.
/Lars Persson Sweden

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ns86
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Location: ontario canada

Re: Crankshaft assemblies

#33 Post by ns86 » Sun Dec 24, 2017 1:40 pm

RC45 said:
These cranks if stored in original plastic/foam/cardboard should have a decent shelf life right?
Mine are about 5 years old, stored indoors and constant 70f room temp. and humidity controlled. Seal kits are vacuum packed so should last longer than OEM in a plastic bag. Perfect condition, I JUST LOOKED :smt023
1985 RZ500
1986 RG500
1986 RG500 C
1992 RGV500 WW ATR
1992 RGV500 LS
1985 NS500 Spencer p
1989 TZR500 Biaggi p
1984 RZV500 Rainey p
1994 NSR250sp R
1983 NS250 p
1987 RG250 WW p
1983 RG250 p
1988 YSR50 p

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giron
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Re: Crankshaft assemblies

#34 Post by giron » Sun Dec 24, 2017 2:22 pm

I heard that the "Gus" rods are not the same dimensions as the stock rods... they are approx 2.5mm bigger at the top of the big end... on the beam. hence they can kiss the case on the up stroke near the base of the cylinder
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

begbie
Posts: 289
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Location: UK

Re: Crankshaft assemblies

#35 Post by begbie » Sun Dec 24, 2017 3:00 pm

AHAMAYfrank wrote:Being the new guy here, I don't know how this works. I don't have my engine disassembled yet but it is higher milage and it has been sitting, so I am sure bottom end new parts will be required. Can I request bening put on the list for both cranks, seals, etc.

Thanks, Frank

Just get you existing cranks rebuilt for half the price.

Vinpg
Posts: 73
Joined: Wed Sep 13, 2017 7:35 pm

Re: Crankshaft assemblies

#36 Post by Vinpg » Sun Dec 24, 2017 4:48 pm

My tooling was made from an oem rod, the long rod crank has a banshee rod those are 10 mil longer and bigger, yep

RC45
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Re: Crankshaft assemblies

#37 Post by RC45 » Sun Dec 24, 2017 10:04 pm

begbie wrote:
AHAMAYfrank wrote:Being the new guy here, I don't know how this works. I don't have my engine disassembled yet but it is higher milage and it has been sitting, so I am sure bottom end new parts will be required. Can I request bening put on the list for both cranks, seals, etc.

Thanks, Frank

Just get you existing cranks rebuilt for half the price.
Not sure anyone in the US is rebuilding 500 cranks for $250 each.
CBR1000RR SP2 HRC WSBK
TZ500V/OW53 Track bike
YZR500 OW81 Clone
OW69 Daytona 200 Replica - 784cc Monster
NS400 Track Bike
RS250R NF5
TZ250T 2KM
TZ250B 3YL
TZR250 3MA Track Bike
427ci C5 Z07

AHAMAYfrank
Posts: 92
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Location: Outside Carrollton, Georgia

Re: Crankshaft assemblies

#38 Post by AHAMAYfrank » Sun Dec 24, 2017 11:23 pm

RC45 wrote:
begbie wrote:
AHAMAYfrank wrote:Being the new guy here, I don't know how this works. I don't have my engine disassembled yet but it is higher milage and it has been sitting, so I am sure bottom end new parts will be required. Can I request bening put on the list for both cranks, seals, etc.

Thanks, Frank

Just get you existing cranks rebuilt for half the price.
Not sure anyone in the US is rebuilding 500 cranks for $250 each.
I was wondering the same. It seems like just the parts would be at or near that, then add the rebuild service, The new assemblies seem to be priced well to me.

Frank
1973 Yamaha AT3 e-start, 1977 Yamaha TY250D, 1985 RZ500, 1987 Suzuki RG500CH, 1991/2014 TZR450F Yamaha, 1991TZ250B Yamaha, 1991 Yamaha TZR250R, 2005 Scorpa SY250R, 2017 Ducati SuperSport939S (for the runners)

vdrive
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Re: Crankshaft assemblies

#39 Post by vdrive » Mon Dec 25, 2017 5:51 am

giron wrote:I heard that the "Gus" rods are not the same dimensions as the stock rods... they are approx 2.5mm bigger at the top of the big end... on the beam. hence they can kiss the case on the up stroke near the base of the cylinder
giron I have a empty case set , just need new cranks then I can check it out . as I wanted to buy one new crank set for spare engine.

Vinpg
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Joined: Wed Sep 13, 2017 7:35 pm

Re: Crankshaft assemblies

#40 Post by Vinpg » Mon Dec 25, 2017 2:33 pm

The 2.5 mm bigger base is not a stock crank, it is a stock stroke but has a 110 rod, I still have some, all the new ones are the same as OEM there are 180 sets out there and your the first one to say that what does the rod no. say ? I'll bet it's 29L it's not a 47X

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2smoke
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Location: Niagara, Ontario,Canada

Re: Crankshaft assemblies

#41 Post by 2smoke » Mon Dec 25, 2017 5:54 pm

I remember that post. I think it was about a crank rebuilt with early yamabits Rods.
And they corrected it at Yambits. I will search for the post.
Never heard of any problems with Gus`s cranks.
Colin

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2smoke
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Location: Niagara, Ontario,Canada

Re: Crankshaft assemblies

#42 Post by 2smoke » Mon Dec 25, 2017 6:11 pm

WVWRZ500N wrote:
Speed Freak wrote:As far as I know it was a wrong outer machining around the big end and the casting burr touched the crankcase.
Would not be a big problem, I will measure and draw the old conrod in CAD and then i can cut the outer shape out of cardboard.

If the new conrods go through they are ok, if not I will grind or machine it down to fit.

Do you know if all the conrods which are available are coming from one supplier?

"Mitaka" only with a sample picture:
http://www.ebay.com/itm/121743313424?redirect=mobile" onclick="window.open(this.href);return false;

Yambits:
http://yambits.co.uk/rd500-conrod-kit-p-2499.html" onclick="window.open(this.href);return false;

Another one which looks the same as the Yambits but more expensive:
http://www.knalnaarpotz.nl/onderdelen/c ... 4rnrf3upl2" onclick="window.open(this.href);return false;

And here another one:
https://www.pjme.co.uk/acatalog/Yamaha_ ... _End_.html" onclick="window.open(this.href);return false;

If they are all the same I would take the cheapest :smt003
I reread this post and wanted to let everyone know that the Yambit's rods have corrected the extra casting area around the big end. They used to be close to or touch the case but now they have relieved that area and it's more like OEM clearance.
Colin

Vinpg
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Re: Crankshaft assemblies

#43 Post by Vinpg » Tue Dec 26, 2017 12:05 am

those do not look like my rod kits, the one post says banshee and rd500 take the same rod kit, yikes

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giron
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Re: Crankshaft assemblies

#44 Post by giron » Tue Dec 26, 2017 11:51 am

same caliper but different numbers

https://ibb.co/czgv76" onclick="window.open(this.href);return false;
https://ibb.co/cLHDum" onclick="window.open(this.href);return false;
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

Vinpg
Posts: 73
Joined: Wed Sep 13, 2017 7:35 pm

Re: Crankshaft assemblies

#45 Post by Vinpg » Tue Dec 26, 2017 12:29 pm

What no. is on the big rod? It's not a 47x rod that's for sure

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