Author Topic: tapered wrist pins (Read 15627 times)

754 · « **Reply #50 on:** December 07, 2009, 05:22:00 PM »

If it lives in a Gixxer, why not in a Honda..

Wrist pin buttons, lighter than steel...

bwaller · « **Reply #51 on:** December 07, 2009, 05:39:35 PM »

Of course the GSXR's pistons have huge side reliefs, a narrower rod small end so the pin boss still is plenty wide enough even with this short pin. My 60mm forged pistons are old school, (not by choice) full round skirt and at 5.4mm shorter than the pin supplied I'm nervous to use the Gixxer pins.

turboguzzi · « **Reply #52 on:** December 07, 2009, 06:58:05 PM »

Quote from: bwaller on December 07, 2009, 05:39:35 PM

Of course the GSXR's pistons have huge side reliefs, a narrower rod small end so the pin boss still is plenty wide enough even with this short pin. My 60mm forged pistons are old school, (not by choice) full round skirt and at 5.4mm shorter than the pin supplied I'm nervous to use the Gixxer pins.

+1, go with the full length of the pins that can fit between the circlips

TG

Sam Green Racing · « **Reply #53 on:** December 07, 2009, 07:24:22 PM »

Quote from: bwaller on December 07, 2009, 05:39:35 PM

Of course the GSXR's pistons have huge side reliefs, a narrower rod small end so the pin boss still is plenty wide enough even with this short pin. My 60mm forged pistons are old school, (not by choice) full round skirt and at 5.4mm shorter than the pin supplied I'm nervous to use the Gixxer pins.

Mike has an address for you Brent, he mentioned it earlier but has gone to bed, suffering with a cold.

PM him tomorrow in case I forget.

Sam.

754 · « **Reply #54 on:** January 29, 2010, 07:42:21 PM »

Got an older Wiseco 836 kit, new in box..

Has tapered wristpins!.. not sure if they are what came with it?
still in bags but marked made in Taiwan..

bwaller · « **Reply #55 on:** January 29, 2010, 08:11:59 PM »

What do they weigh out of curiousity? It is next to impossible finding lightweight tapered pins in the 15x50mm size.

754 · « **Reply #56 on:** January 29, 2010, 10:54:12 PM »

I will try to get a weight on them..

CB500Four · « **Reply #57 on:** January 30, 2010, 02:22:07 AM »

Hello!

I have here some stock Honda wrist pins.

CB750 DOHC
OD 15mm ID 9.10mm length 50.38mm weight 44g

CB900 DOHC
OD 15mm ID 9.10mm length 52.95mm weight 46g

CBX1000 DOHC
OD 15mm ID 10.10mm length 50.37mm weight 38g

CB750 DOHC self tapered running in my engine
OD 15mm ID 9.10mm to 12.80mm length 50.48mm weight 35g

Regards,

bwaller · « **Reply #58 on:** January 30, 2010, 04:57:21 AM »

Hey thanks CB500Four, great info. It may just be the breakthough news I was looking for.

I was about to give up on this and finally heard back from another piston manufacturer about some 40g straight wall pins, so suddenly I'm swimming in lighter weight options.

It's a good thing some parts are delayed and that I'm so bull-headed!

(can hardly wait for the Sam comment here

)

754 · « **Reply #59 on:** January 30, 2010, 08:32:04 PM »

Tapered bore pins, came with a Wiseco 836cc kit

56.1mm long

44.5 gr

8.54 mm ID

stock 736cc pin from 3pce oil ring piston....40 gr

MTC forged 970cc piston, tapere bored pin 49.63 gr

got some piston weights, will post on light pistons.

turboguzzi · « **Reply #60 on:** February 02, 2010, 06:48:29 AM »

Quote from: CB500Four on January 30, 2010, 02:22:07 AM

Hello!

I have here some stock Honda wrist pins.

CB750 DOHC
OD 15mm ID 9.10mm length 50.38mm weight 44g

CB900 DOHC
OD 15mm ID 9.10mm length 52.95mm weight 46g

CBX1000 DOHC
OD 15mm ID 10.10mm length 50.37mm weight 38g

CB750 DOHC self tapered running in my engine
OD 15mm ID 9.10mm to 12.80mm length 50.48mm weight 35g

Regards,

hei heinz, the last ones sound good, but how do you know the difference from the first 750 dohc.... :-)

got part numbers for the 35g pins?

cheers

yossef

754 · « **Reply #61 on:** February 02, 2010, 07:41:55 AM »

Sounds like he modded them himself!

turboguzzi · « **Reply #62 on:** February 02, 2010, 10:54:34 AM »

Quote from: 754 on February 02, 2010, 07:41:55 AM

Sounds like he modded them himself!

now that you say it.... "self tapered" can be read in a few ways

TG

CB500Four · « **Reply #63 on:** February 02, 2010, 03:04:00 PM »

Quote from: 754 on February 02, 2010, 07:41:55 AM

Sounds like he modded them himself!

Thanks,

that was it what i would to describe.

I have lightened the pins on a lathe.
They have a thin hardened skin but if you break thru
it´s relative easy to turn it down.

Regards,

Sam Green Racing · « **Reply #64 on:** February 02, 2010, 10:49:24 PM »

Quote from: bwaller on January 30, 2010, 04:57:21 AM

Hey thanks CB500Four, great info. It may just be the breakthough news I was looking for.

I was about to give up on this and finally heard back from another piston manufacturer about some 40g straight wall pins, so suddenly I'm swimming in lighter weight options.

It's a good thing some parts are delayed and that I'm so bull-headed! (can hardly wait for the Sam comment here )

I never said a word

Did you contact the people at that address that Mike gave you ?

Sam.

bwaller · « **Reply #65 on:** February 03, 2010, 04:23:58 AM »

Yes thanks for the name Mike & Sam, Precision Products Performance Center and they can manufacture pins but not near the weights I was hoping for. Good folks though.

I like the CB500Four option.

turboguzzi · « **Reply #66 on:** February 03, 2010, 03:10:46 PM »

Quote from: bwaller on February 03, 2010, 04:23:58 AM

Yes thanks for the name Mike & Sam, Precision Products Performance Center and they can manufacture pins but not near the weights I was hoping for. Good folks though.

I like the CB500Four option.

Brent, turn some wood dowels on a lathe if you want, just get that motor running!!!!

TG

bwaller · « **Reply #67 on:** February 03, 2010, 03:23:38 PM »

I hear ya TG, believe me. Problem is, different parts of this bloody motor are spread all over North America.

We're get there. $:-\$

Sam Green Racing · « **Reply #68 on:** February 03, 2010, 11:18:05 PM »

Quote from: turboguzzi on February 03, 2010, 03:10:46 PM

Quote from: bwaller on February 03, 2010, 04:23:58 AM
Yes thanks for the name Mike & Sam, Precision Products Performance Center and they can manufacture pins but not near the weights I was hoping for. Good folks though.

I like the CB500Four option.

Brent, turn some wood dowels on a lathe if you want, just get that motor running!!!!

TG

Good idea TG, balsa wood is nice and light

Sam.

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Author Topic: tapered wrist pins (Read 15627 times)