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Post your engine mods

  • Thread starter Thread starter 82gs1100
  • Start date Start date
8

82gs1100

Guest
engine builds or anything that that improved your gs motor. Let people know what can be done to our GS bikes,
 
Coming soon to my cafe...

77 750 with 79 850 jugs and pistons. A drop in big bore kit minus 1cc without the $500 in parts :)
 
My current project's motor:

1080 piston kit
welded crank
ported head
new valves
new cams
Heavy duty clutch
oil cooler
VM29's
 
Try a search. A lot of posts on this site about engine builds. Sry, but I don't have a web site anymore to give you a link.

Are you wanting to build up your 1100 and looking for ideas?
 
im in the process of building my gs1100gz
its being built by Fast By Gast. i couldnt find a list of rebuilds so i thought that it mite be nice for some one building a motor to find a thread of just rebuilds. if u do a search ypu find alot of long threads that are not realy about rebuilding motors.
heres what we are doing
Cams: Web Cams #70-061 .395/.395
Cam Sprockets: APE adjustable
Cam Chain: HD
Cam Chain Tensioner: APE manual
Head: $995 Head Job
Head Gasket: custom for bore
Carbs: Mikuni 34mm RS
Pods: APE for Mikuni RS
Throttle: required push pull
Head Studs: APE
Head Stud Nuts: APE
Main Studs: APE
Block: 73mm bore largest safe for street use
Pistons: custom JE 10.25:1
Crank: Welded
Clutch: APE extra plate
Clutch Basket: welded
Transmission: Undercut
Ignition: Dyna 2000/ coils
 
Last edited:
82gs1100 said:
im in the process of building my gs1100gz
its being built by Fast By Gast. i couldnt find a list of rebuilds so i thought that it mite be nice for some one building a motor to find a thread of just rebuilds. if u do a search ypu find alot of long threads that are not realy about rebuilding motors.
heres what we are doing
Cams: Web Cams #70-061 .395/.395
Cam Sprockets: APE adjustable
Cam Chain: HD
Cam Chain Tensioner: APE manual
Head: $995 Head Job
Head Gasket: custom for bore
Carbs: Mikuni 34mm RS
Pods: APE for Mikuni RS
Throttle: required push pull
Head Studs: APE
Head Stud Nuts: APE
Main Studs: APE
Block: 73mm bore largest safe for street use
Pistons: custom JE 10.25:1
Crank: Welded
Clutch: APE extra plate
Clutch Basket: welded
Transmission: Undercut
Ignition: Dyna 2000/ coils
Click to expand...

It sounds like you know what you want, and how do go about doing it. I am just not sure why you'd waste all that money on beefing up a shaft driven bike. You had better check into what you can do to beef up the secondary hypoid gears, the final drive hypoid gears, the rear splines both in the final drive and in the wheel itself (because I PROMISE you, and I say that with all conviction, if you havent changed out that wheel hub spline, what you are doing to that motor WILL strip it out QUICKLY, thats not a MIGHT, thats a WILL) and the splines on the propeller shaft. You lose alot more HP thru a shaft drive motor from the wheel to the crank than you do with a chain driven bike, so be aware of that as well. I am not trying to disuade you from doing this, because im curious to see what they will withstand, but it seems to me that if *I* were doing this, I would be doing it on a chain drive bike. Heck, you cant even change your gear ratio on a shaftie...:(
 
Paul doing the rockers for it? $1000 on the head seems VERY cheap if the rockers, other parts and setup were also included with the porting. Now about that shaft drive.....

IMO, save the $$$$.
 
82gs1100 said:
im in the process of building my gs1100gz
its being built by Fast By Gast. i couldnt find a list of rebuilds so i thought that it mite be nice for some one building a motor to find a thread of just rebuilds. if u do a search ypu find alot of long threads that are not realy about rebuilding motors.
heres what we are doing
Cams: Web Cams #70-061 .395/.395
Cam Sprockets: APE adjustable
Cam Chain: HD
Cam Chain Tensioner: APE manual
Head: $995 Head Job
Head Gasket: custom for bore
Carbs: Mikuni 34mm RS
Pods: APE for Mikuni RS
Throttle: required push pull
Head Studs: APE
Head Stud Nuts: APE
Main Studs: APE
Block: 73mm bore largest safe for street use
Pistons: custom JE 10.25:1
Crank: Welded
Clutch: APE extra plate
Clutch Basket: welded
Transmission: Undercut
Ignition: Dyna 2000/ coils
Click to expand...

As TCK has pointed out, you are asking for trouble from the drive line.

I have bored and raised the CR on my shaftie and I run a good 4-1 pipe. Just with these mods, I have got increases of 25% in HP and 38% in torque over stock. To date, I haven't damaged anything including the clutch. I don't do holeshots though. If you lube the drive splines on the diff and wheel hub each tyre change, you shouldn't have any failures here with moderate increases in HP. If you plan on hauling the front wheel off the deck with each takeoff, you'll be doing lots of repairs to the drive line!
 
i wont be doing burn outs with it or drag racing.
iv been told from people who have modded shaftys that told me not to worry as long as i don't abuse it.
i do have two drive trains so im not afraid of it.
o god cmt's 40 sexiest videos is on
 
Last edited:
after seeing pics of isleomans work of art of a gs1100e i mite not go for so much on the gz and get a e for my next project. put that wont be for at least a year.
the pistions are already on order and block has been bored. the trany will be under cut. i should call and see what all has been done so far.
 
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