Custom Fighters - Custom Streetfighter Motorcycle Forum banner
1 - 20 of 24 Posts

·
Function IS Form
19 Z900, 88 Kat11
Joined
·
17,434 Posts
Discussion Starter · #1 ·
So yeah. I blew the motor on my GS450L. I was hitting the nearby twisties loop on this.. uh... beater bike... it wouldn't go over 30 mph and the top end was praying to Zeus. Before the motor blew I managed to waste a couple of Harley softtails through the curves with a bike that was decelerating at full throttle...

So what motors do you guys think will drop in this thing besides another 450? It's a 1985
 

·
Function IS Form
19 Z900, 88 Kat11
Joined
·
17,434 Posts
Discussion Starter · #3 ·
Everything but the mounts will line up with a four cylinder in there?
 

·
The Soft Serve Enigma
Joined
·
16,719 Posts
Pretty much an GS series engine would work, with a little bit of ingenuity. We have a customer who put a GS750 engine into a GS450L.
 

·
fighter transplant in NC
Joined
·
14,319 Posts
I'm gonna vote for a modern gs500f motor
 

·
Build It Ride It Live It
Joined
·
10,684 Posts
I'd consider that a down grade, LOL. Sorry, just not very impressed with those bikes.

Haelo,

I think it could work. Worst thing you'll have to worry about is the down tubes and the exhaust interfearing.
 

·
Function IS Form
19 Z900, 88 Kat11
Joined
·
17,434 Posts
Discussion Starter · #10 ·
Exhaust I'll deal with
I'm concerned with the chain lining up... I do NOT want to fuck with that
 

·
Stiff Member
Joined
·
513 Posts
I saw a conversion for the GS500 motor, was a little extreme but very cool. Took a GSXR head cut off the outer two cylinders and then 85 mm pistons from a GSXR1000 to 1300 kit and made a GSXR650 twin. Seems the cylinder and crankcase was almost exactly the same as a GSXR1000 with the outer cylinders removed.

Just food for thought. Another option would be a SV650 or SV1000 motor which is narrow enough to make installing it easier.

I'm kind of voting for a SV650 one, would make a neat fighter.
 

·
British Bloke in Canada
Joined
·
2,146 Posts
I say whack in a great big single cylinder.
 

·
Registered
Joined
·
2,118 Posts
I know that any GS-series twin motor will pretty much bolt right in (400/425/450/500). I was under the understanding,though, that the I4 motor frames were wider at the two bottom engine cradle rails, and you would have to chop the frame up to get the I4 in there.

BTW, 3 weeks ago I was about to jump the gun and swap in a GSX600/750 (Katana) motor in.:suzuki::party:
 

·
the mad doctor
Joined
·
3,399 Posts
I saw a conversion for the GS500 motor, was a little extreme but very cool. Took a GSXR head cut off the outer two cylinders and then 85 mm pistons from a GSXR1000 to 1300 kit and made a GSXR650 twin. Seems the cylinder and crankcase was almost exactly the same as a GSXR1000 with the outer cylinders removed.
i saw that too. craziness.

I say whack in a great big single cylinder.

+1!!!

a fuel injected raptor 700 motor in that would be sweet :D

oooor... find a used rotax single!! they can be had from ex-racebikes for decent prices.
 

·
Function IS Form
19 Z900, 88 Kat11
Joined
·
17,434 Posts
Discussion Starter · #16 ·
I saw a conversion for the GS500 motor, was a little extreme but very cool. Took a GSXR head cut off the outer two cylinders and then 85 mm pistons from a GSXR1000 to 1300 kit and made a GSXR650 twin. Seems the cylinder and crankcase was almost exactly the same as a GSXR1000 with the outer cylinders removed.

Just food for thought. Another option would be a SV650 or SV1000 motor which is narrow enough to make installing it easier.

I'm kind of voting for a SV650 one, would make a neat fighter.

The SV650 engine is longitudinal and probably wouldn't fit in the GS450's cradle frame without extensive fuckery.
 

·
Function IS Form
19 Z900, 88 Kat11
Joined
·
17,434 Posts
Discussion Starter · #17 ·
I know that any GS-series twin motor will pretty much bolt right in (400/425/450/500). I was under the understanding,though, that the I4 motor frames were wider at the two bottom engine cradle rails, and you would have to chop the frame up to get the I4 in there.

BTW, 3 weeks ago I was about to jump the gun and swap in a GSX600/750 (Katana) motor in.:suzuki::party:
Thanks. It's way narrower than my GS750 frame was.
 

·
Function IS Form
19 Z900, 88 Kat11
Joined
·
17,434 Posts
Discussion Starter · #18 ·
i saw that too. craziness.




+1!!!

a fuel injected raptor 700 motor in that would be sweet :D

oooor... find a used rotax single!! they can be had from ex-racebikes for decent prices.


Wouldn't putting a thumprocket in there involve more fuckery than I intend? :(
 

·
Registered
Joined
·
2,118 Posts
Wouldn't putting a thumprocket in there involve more fuckery than I intend? :(
It'd be sweet......it really depends on how big those motors are. Anyone know just how big a decent thumper motor is?

Edit: may be talkin outta my ass a bit, be back later after classes.
 

·
Stiff Member
Joined
·
513 Posts
You could find a slightly older 2 stroke 500, that would put some hair on your chest!!!! Not to mention it would definitely fit. Oh wouldn't that be fun?

A Yamaha TDM 850 might work also. Its actually a pretty short motor, just a little tall. Would have to measure it to be sure.
 
1 - 20 of 24 Posts
Top