93 Super Rat questions

[rlkarren]

In an earlier post I shared the low numbered 1969 (model 93) Super Rat I rescued from certain death. In the process of rebuilding it, I've come up with a couple questions:

1. Which is the correct pipe? I've seen many photos of pipes with nothing, with spark arrestors, Flame throwers ends, and etc. Which is the correct version? I'm guessing it was just a pipe with no silencers or spark arrestors. At least that's what the Owner's Manual photo shows. And how long is the exhaust tip supposed to be? I found one that I think has been shortened to about 1 1/2 inches.

2. F-Code motors. The info used to be that F-Code motors were very early (93) Super Rat motors, but new info places them as replacement Super Rat motors beginning in 1970. The original M-Code motor I have has been severely damaged but is salvageable. I know of an F-Code motor case in great shape I could use. What would you advise? Would an F-Code motor be valued more than an original M-Code motor? One thing to keep in mind is that the F-Code motor cylinder deck is much larger than the M-code. I'm at the point where I need to decide which case to use because I think that the cost to repair the M motor or the cost to purchase the F motor will be about the same.

I appreciate your comments. Thanks.

Roger

[racerclam]

The correct pipe has a open stinger no silencer , Bill cook has the correct reproduction pipe available .

Rich

[BrianZ]

Hi Roger;

I measure the pipe on my 93A and the stinger is 4" long.

Having the original motor with the proper serial numbers will always make the bike worth more than one having a replacement motor. I don't know how much more, as it depends on the quality of the restoration, rarity, the market, etc. If it was me, I would try to have the original motor repaired. If you decide to use the replacement, make sure that you keep the original cases in case you change your mind in the future.

Brian