Latest TR25W carnage

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bajatr25w
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Latest TR25W carnage

Post by bajatr25w » Wed Sep 03, 2014 6:49 am

Hi everyone,im a proud owner of 1969 TR25W ,bought with seized engine,removed head i can also move cylinder up n down a bit,so rod is probably seized,my question is regarding HPbystan comment,is the 71 con rod really good ??,ive heard that rod part #71-3667 was the best, but just how good are they ??,aalso how hard is it to convert to pos ground.thnx for sharing your knowledge.

Jeff K
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Re: Latest B25 carnage

Post by Jeff K » Wed Sep 17, 2014 3:56 pm

bajatr25w wrote:Hi everyone,im a proud owner of 1969 TR25W ,bought with seized engine,removed head i can also move cylinder up n down a bit,so rod is probably seized,my question is regarding HPbystan comment,is the 71 con rod really good ??,ive heard that rod part #71-3667 was the best, but just how good are they ??,aalso how hard is it to convert to pos ground.thnx for sharing your knowledge.
Positive ground is easy, I did it my B40 project. Just pick up a Podronics unit. It will eliminate the Zener and the rectifier. I got lucky and got used one on Ebay for $25.00
Jeff

midgie
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Re: Latest B25 carnage

Post by midgie » Wed Sep 17, 2014 7:36 pm

Jeff K wrote:
bajatr25w wrote:Hi everyone,im a proud owner of 1969 TR25W ,bought with seized engine,removed head i can also move cylinder up n down a bit,so rod is probably seized,my question is regarding HPbystan comment,is the 71 con rod really good ??,ive heard that rod part #71-3667 was the best, but just how good are they ??,aalso how hard is it to convert to pos ground.thnx for sharing your knowledge.
Positive ground is easy, I did it my B40 project. Just pick up a Podronics unit. It will eliminate the Zener and the rectifier. I got lucky and got used one on Ebay for $25.00
Jeff
the 71 rod is a super performer and we raced and hard with it for many years with zero problems, the 71-3667 rod you mentioned is just a part no. change to the 70-9911 rod, because it had new big end bolt nuts and locking tabs added. regards midgie.

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HPbyStan
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Re: Latest B25 carnage

Post by HPbyStan » Wed Sep 17, 2014 9:59 pm

One thing the factory '71 rod does have going for it is the steel rod cap. The after market alloy rods are better except for having an alloy rod cap that will break if you're making any HP. Guess you get a choice as to where the rod will fail maybe. I haven't had any trouble with my M.A.P. alloy rod from Florida, USA but the bike has been sitting for awhile and Walt M broke his UK sourced alloy rod at the similar looking bottom cap.

bajatr25w
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Re: Latest B25 carnage

Post by bajatr25w » Mon Sep 22, 2014 6:30 am

Hi everyone,thanks for all the info.Glad to be part of this forum,i will look for the 70-9911 rod,Carrillo im sure would be great,but this will do i dont plan on racing it or abusing it.thnx Midgie.

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