3 engines 1 bike

[Damienga15de]

I have 3 engines, and one empty frame, 

1991 gsxr 750 (burning hideous amounts of oil and exhaust threads wrecked) 

 

1989/90 gsxr 1127 (bottom end bearings badly gone) 

 

1991 gsxf 1127 (2nd gear gone) 

 

 

What is the best combination I can make, iv looked at frankemsteins guide there's a lot going on in it. I'm going to look again but I think the gsxf bottom end with the  750 6speed box, and I'm struggling to understand if the gsxr1127 head will be an improvement over the gsxf 

[davecara]

Use the gearbox from the 11R in the 11F and put the gsxr cams in the F motor.

sell the 750 as spares to pay for gaskets.

[Damienga15de]

Front oil drain is leaking on the gsxf 1127 so the head has to come off anyway, the gsxr 1127 is port matched for my bst 38s already would it be better to. Just swop. The heads over 

[gray711]

You could sell me the sump & strainer off of your 750 lump if you do break it 

[Joseph]

I would put the 750 box in the F cases with the R cams. i have a 1216 fitted like that and it has great feel to it thanks to the proper gearing of the 6 speed box

Edited June 23, 2022 by Joseph

[Swiss Toni]

@Damienga15deI have an 1100F gear cluster here if you want to stay stock?

Edited June 24, 2022 by Swiss Toni

[Damienga15de]

10 hours ago, Swiss Toni said:

@Damienga15deI have an 1100F gear cluster here if you want to stay stock?

What is this stock you speak of? 

[Swiss Toni]

It's an Americanism for Standard. As in 'Factory'!

[Upshotknothole]

As in boring. 

[BikeJake]

Where and how do I get and fit and top end rad 

[Damienga15de]

Anyone know what size hole needs to be drilled in the 750 gear shaft handy save me dragging out one of the 1100s and measuring it 

[Devilman]

1 hour ago, Damienga15de said:

Anyone know what size hole needs to be drilled in the 750 gear shaft handy save me dragging out one of the 1100s and measuring it 

If it's anything like drilling the output shaft (which I would have to assume it is) , there is a lot of useful info in this thread...
 

Since they are case-hardened they can be pretty tough going to drill through from my understanding

[Digs]

I’ve chased a badly damaged thread on my wp engine output shaft. Found it fairly soft considering It’s load case. 

Should drill fine of It’s anything like one. 

[Joseph]

On 6/30/2022 at 9:20 PM, Damienga15de said:

Anyone know what size hole needs to be drilled in the 750 gear shaft handy save me dragging out one of the 1100s and measuring it 

12mm