Modification needed to fit MarkII passenger boards to a MarkI

[coy55boy]

I bought a pair of MarkII ('87) passenger boards on eBay and trying to fit them on my '83. The 3 mounting holes line up OK. The problem is with the muffler attachment. There's a wide gap and a bit of an offset. Anyone know of a solution?

[Dano]

Can you make a small bracket? Put a pic up here if you can (manage attachments) and we'll help you out.

[bongobobny]

Yes, what you have to do is make a set of hangers to mount the mufflers. I used 1 inch aluminum bar stock to make mine. I had spares but the last set I sent to a guy in New Mexico and a month later I got the torn remains of the envelope from the Post Office with a note of apology that the post sorter machine ate the contents! I hung the straps using the bolt whrere the rear subframe bolts to the main frame. I'll try to take pictures this evening if I can but my '84 is buried under stuff in the gtarage.

 

Someone else mentioned using a rubber piece from a car shock mount to do the same job...

[coy55boy]

Yes, what you have to do is make a set of hangers to mount the mufflers. I used 1 inch aluminum bar stock to make mine.

 

I got down there and eye-balled it close up and think I see what you're talking about. It looks like that will give me good vertical support. However, not much in the way of lateral support. Not sure how important the lateral support is... Although I suppose that if I use a thick enough piece of aluminum, that should be sufficient.

 

Have you got dimensions of the bracket you manufactured? Or did you use the 'By Guess and By Golly' method?

[dingy]

Below is a picture of one of the brackets bongobobny mentioned in previous post.

 

Bracket is 1/8" aluminum x 1 1/4" wide. I can't get a length measurement or hole to hole distance.

 

Top was rounded and bottom cut at angle to match horizontal line of muffler.

 

Gary

[coy55boy]

Below is a picture of one of the brackets bongobobny mentioned in previous post.

 

Bracket is 1/8" aluminum x 1 1/4" wide. I can't get a length measurement or hole to hole distance.

 

Top was rounded and bottom cut at angle to match horizontal line of muffler.

 

Gary

 

 

Thanks, Gary! No lateral vibration issues?

[bongobobny]

My pictures didn't come out much better, I would have to pull off one of the florboards to make the picture better. As far as side play, I never had any, and if your muffler is that losoe then there's a problem...

[dingy]

Thanks, Gary! No lateral vibration issues?

 

None that I have noticed.

 

I have about 6000 miles since I put them on. I have had the mufflers off a few times to swap between my quiet set and the straight pipe set and they were always tight.

 

Gary

[coy55boy]

I have had the mufflers off a few times to swap between my quiet set and the straight pipe set ...

 

Hmmm, never thought of having a spare muffler set. Are there special occasions you put the straight pipes on for?

[dingy]

Hmmm, never thought of having a spare muffler set. Are there special occasions you put the straight pipes on for?

 

90% of the time I have the set of stock pipes that I gutted out to the last baffle.

 

I can swap them in about 15 minutes.

 

Once I got used to them, I quit swapping. I have never had a louder bike, but the straight set seems to give bike some more power.

 

Navigator likes quieter set, but she doesn't ride that much.

 

Gary