R65 Siebenrock Kit

[tlangman4]

Hi everyone-

After my recent purchase of an ‘81 R65, I am in the middle of an overall evaluation process of work that needs to be completed. The odometer indicates 38k, but the bike looks a lot more tired than that. A top end rebuild appears necessary, and perhaps other engine work as well.

I have been considering the Siebenrock 860 kit as an alternative to the stock top end. After searching for comments regarding the topic on this forum, there have been indications from a few who have used the kit that have indicated it to be a solid upgrade. Yet, there appears to also be an issue with the squish area due to the piston shape, etc.

I am interested in hearing from anyone who can provide more long-term detail regarding this issue, and what the possible effects this may have on engine life, or other potential concerns that exist with the kit.

Thanks again for all the help and advice!!

Tom

 

[20774]

I only have 10K miles on the Siebenrock top end for my /7...so far so good. As for piston shape and head configuration, I find it hard to believe that Siebenrock wouldn't have researched that. You could call Ted Porter at the Beemer Shop and get his input.

 

[179212]

Hi everyone-

After my recent purchase of an ‘81 R65, I am in the middle of an overall evaluation process of work that needs to be completed. The odometer indicates 38k, but the bike looks a lot more tired than that. A top end rebuild appears necessary, and perhaps other engine work as well.

I have been considering the Siebenrock 860 kit as an alternative to the stock top end. After searching for comments regarding the topic on this forum, there have been indications from a few who have used the kit that have indicated it to be a solid upgrade. Yet, there appears to also be an issue with the squish area due to the piston shape, etc.

I am interested in hearing from anyone who can provide more long-term detail regarding this issue, and what the possible effects this may have on engine life, or other potential concerns that exist with the kit.

Thanks again for all the help and advice!!

Tom

I have a friend with r 65 purchased new his odometer says 20 or 30 thousand but is off by 200,000. ( odometer has rolled over twice)