GS 1000 engine in GSXR 1100 first gen frame?

[John Kat]

The complete exhaust is now in place.
It's really tight under the engine despite shortening the fins quite a bit.
Good enough to get the engine started.
Next challenge will be to secure the seat from Airtech...
I've never done this before and I'm not quite sure how to go about doing so?
Here's what it looks like so far:




The trick I used to secure the exhaust header

A mock up of the seat support

[Fjbj40]

You are most probably right.
I have also looked at the "Moto Martin" fairing but it requires having the clip-ons below the triple tree.
It would have been fine when I was a little younger...

LOL, how true about the younger.....but then again we usually did not have the disposable cash for this type of fun!

[John Kat]

I think it would add to the transition concept, however, for me the "S" fairing is not correct, as it sits.

I think it is not long enough on the bottom and not wide enough to encapsulate the front of the bike. I feel it needs to be larger but not go all the way down as to hide the engine, not sure if that makes sense?

cheers,
Daryl

Keep going though, this a very cool venture!

You are most probably right.
I have also looked at the "Moto Martin" fairing but it requires having the clip-ons below the triple tree.
It would have been fine when I was a little younger...

[Fjbj40]

I think it would add to the transition concept, however, for me the "S" fairing is not correct, as it sits.

I think it is not long enough on the bottom and not wide enough to encapsulate the front of the bike. I feel it needs to be larger but not go all the way down as to hide the engine, not sure if that makes sense?

cheers,
Daryl

Keep going though, this a very cool venture!

[John Kat]

The seat came in today but needless to say it will require some work to fit it on the bike.
On one of the pictures, you will see the seat, the GSXR 1100 tank and a GS 1000 S fairing.
In the end, I wonder if this fairing would not be the most appropriate for the bike?
It would be attached to the frame instead of the front fork.
Given that the XR 41 was a transition model between the the GS 1000 ( for the engine) and the GSXR 750 for the frame it would add to the transition idea?
What do you think?

[posplayr]

The pipe is hanging nice

[John Kat]

Finally some progress...
The fins on the bottom engine cover got trimmed further to clear the headers but will require a little further grinding!
The front left engine bracket is now fully functional.
The headers got painted.
The exhaust midpipe got lengthened.
I had bought a small metal plate to mount the CDI to the battery box but I realized that stainless steel might be nice to look at but almost impossible to drill through!
Next step secure the muffler in place.

Here are the pictures:

[John Kat]

The bike is looking killer!

Thanks!
Progress is slow as I moved houses in the meantime.
In any case I still haven't received the seat from Airtech...

The bike is looking killer!

[John Kat]

Looks great! Is the header a 4 into 1 or 4 into 2 into 1?

Either way ground clearance looks acceptable.

The header is the OEM header used on the GSXR 750 from 1991.
It's a 4 into 1 model with a twist as there is a horizontal plate at the end of the header so that in practice cylinders 1 and 3 get to mix just like 2 and 4 slightly before getting all together.
So it looks like a 4 into 1 from the outside but internally it's a 4 into 2 into 1 at least for a few centimeters.
I forgot if this approach boosts power versus torque as I know some bikes mix the exhaust gasses between the even and the odd cylinders?

[John Kat]

Looks good to me also. That first view makes me wonder how the bike would look naked or semi naked, as it seat / tail and perhaps a bikini fairing. I love the aluminum frame and exposed engine.

Thanks!
I will definitely not use a full fairing on the bike.
Currently I'm investigating using the upper part of the CBR 600 model 98-99 fairing.
Poly 26 in France sells a replica ( model # 530) that can be used with two round headlights.

http://www.poly26.com/carenage-moto-tuning-honda-600-cbr-1988-1990_2-5.html

It should have enough of the period look while beeing able to accomodate clip-ons above the triple tree.
Will it be wide enough is the question?

[Fjbj40]

Looks great! Is the header a 4 into 1 or 4 into 2 into 1?

Either way ground clearance looks acceptable.

[dorkburger]

Looks good to me also. That first view makes me wonder how the bike would look naked or semi naked, as it seat / tail and perhaps a bikini fairing. I love the aluminum frame and exposed engine.

[John Kat]

The Cobra exhaust went onto the bike without any issue except that the intermediate pipe will have to be extended to take the frame extension into account.
Looks good to me?



Can't wait to do a back to back comparaison with the orange one

[John Kat]

Some good news and a small setback today.
The issue came from the front left engine bracket that was composed of three parts welded together.
While it fitted perfectly when not assembled, it proved impossible to insert the bracket between the engine and the frame due to it Z shape...
Back to the drawing board but at least I know how to correct the issue.
The OEM GSXR 1100 G/H throttle cable is now also in place.
It's tight but it works fine.
Last but not least, I got my Cobra muffler from Germany this morning.
Beautifull workmanship in stainlees steel.
It luckily went onto my GSXR 750 91 header with no problem.
Tomorrow the real test: will it fit on the bike?
Here's what it looks like: