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Easy GS750 mods??

  • Thread starter Thread starter T8erbug
  • Start date Start date
T

T8erbug

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I am getting ready to pull the engine on my 79' GS750. I want to repaint the block and replace the gaskets. I figure since the motor is being torn down I should try to do what is sensible and make the best of the situation. It's not everyday you have the motor in pieces and easily workable. What are some reasonably priced upgrades or mods that can be done?
 
Depends on what you're definition of reasonably priced is.
Short of a bore kit, making the head breathe better and some hotter cams, there's not much you can do in there that's going to have much of an impact.

You're better served, IMO, spending that money on a nice high flow pipe, pods and rejetting the carbs.

Even better still, leave it alone, spend the money on upgrading the suspension, and tires and learn to ride it very well. Even at stock displacment, a well piloted 750 will give clueless and talentless squids on thier latest and greatest plastic fantastic fits in the twisties. Better still, you'll be grinning fromear to ear.

My motto is simple. Most GSes need more power on their stock suspension like you need another hole in your butt.
 
1100 engine would probably be the best performance per dollar if you could shoe horn it in there
 
Going to have to agree with TCK here, put it back together and upgrade your suspension. Re-build the front forks with new springs and consider some decent rear shocks.
 
+ 4 or 5 on the "leave the engine and upgrade the suspension" vote.

One of the favorite parts of sport touring was for a group of 4 or 6 of we old guys on camping gear loaded, knobby tire fitted, KLR650's going by some squibs on CBR600RR's.:D All the power and handling in the world won't help if you can't rid and all the power in the world won't beat the guy who doesn't have to slow down.;)

Start trying to increase power and you will come out second to the guy with the newer bike but improve the suspension, which doesn't show, and you can be so smug!:cool:
 
+1 on upgrade suspension!
Soft suspension takes away allot of power. Instead of the power going to ground and pushing the bike ahead she will squat more and all that launch energy is lost. Tighten up the suspension is a first. A simple port&polish would be easy enough with the head off. Pods exhaust. Lighten the bike up! I shed nearly 50lbs off my 750L and that made a huge difference! I always prefer to increase the rear sprocket a few teeth or a drop a tooth in the front. If you never bring it to redline in 5th uping the gearing will increase your accelration. My 750 was as fast as I wanted to go with it. Accelerated to 60 in about a dead even 3 seconds. But topped out at 125mph. Same with the B-12 I dropped the gearing on that too. Accelration is more fun than top speed in my personal opinion.
 
Shed weight etc...

Shed weight etc...

I agree here, lighten up the bike, aftermarket pipe sheds tons of weight, converting the 630 (I'm looking to do this soon) chain and sprockets to a 530, more weight gone. K&N air cleaner, jet the carbs and a hotter coil pack. Up grade the suspension for sure. Better and adjustable shocks in the rear and new springs and fork brace up front. On my 750 about to change out the no adjustment fork set up to an more adjustable system off an 1100 of the same year with a brace. Run the engine till it actually needs a rebuild then punch it up to a 850 with all the goodies. Oh and don't forget to check and replace steering bearings, swing arm bearings and all the rest Loose and wore out bearings kill your handling. Don't forget about the brakes either, new SS brake lines, pads etc. Gotta be able to stop as well. We having fun yet
 
Thanks guys! Yeah I have gone the suspension route. I was pleasantly surprised at how quick the bike was for being older than me and coming from riding a Honda 919. Suspension upgrades will be a work in progress. I just mounted up a 2001 gsxr fork (a bit too short but an easy fix with some extenders), an alloy rear swingarm, and hopefully some longer dual rate shocks in the back. Anyone know a good direction to head on the stock 750 rear suspension? Also how can I set up my profile to give me notifications when people post on my threads?? Sorry I'm still trying to figure this forum stuff out haha
 
7981GS said:
You are going to buy the gaskets anyway...

http://www.ebay.com/itm/1981-SUZUKI...es&vxp=mtr&hash=item564659892f#ht_1065wt_1398

Some new rings and you have 843 cc's.

Daniel
Click to expand...

Pipe check, pods check, jetted check, gs1100 swingarm check, 2001 gsxr forks and brakes check, 160 rear and 120 tire up front check. Now how about the engine? Will 850 jugs bolt straight up? What do I need to make it work? Can anyone point me in the direction of a thread with a 750 to 850 conversion? Thanks!
 
Being as it's a 79, a GS1000 engine is almost a straight swap. I know TKent has done it along with a few others on here. You can get one and build it while still riding it with the 750 engine for now. The top end off an 8 valve 1100 will fit the 1000 if you want to upgrade before you swap.
 
will61310 said:
Being as it's a 79, a GS1000 engine is almost a straight swap. I know TKent has done it along with a few others on here. You can get one and build it while still riding it with the 750 engine for now. The top end off an 8 valve 1100 will fit the 1000 if you want to upgrade before you swap.
Click to expand...

My biggest concern would be, if I were to do a motor swap, the width of the new motor. I def wouldn't want to go wider at all. If I were to do a swap I'd likely put in a newer/narrower engine.
 
A high compression wiseco 844 piston kit will really really add some thump to that engine! look into some minor porting and polishing if you are skilled and daring enough to do so. this is a tricky area, and you don't want to touch it with out researching it really well
 
Open your thread and on top of your first post there is a little tool bar looking think, click thread tools, then go down and click on subscribe to thread, and pick your type of notification. Also you can go to your User CP (Control Panel) and then to options I believe IIRC and then there is a spot to change all threads you post to, to provide notifications.

Cant help ya with the 750 mods tho, sorry.
 
I "think" the gs750-1150 share the same cylinder spacing. GS850's are based on the 750 engine, same cylinder spacing, same head, but use GS1000 cams. Same carb rack on all three. I'd venture to say the 1100&1150 are "probably" the same bore spacing as well, but not 100% sure.

People do the 7/11 swap often - 750 frame with an 1100 engine. Honestly a gs750 with pods/pipe/jets is PLLLLEEENNNTTTYYYYYYYYY FAST however! an 844 wiseco kit with pods/pipe/jetted would be as fast as a stock gs1000 easily. Jump 2 teeth up in the back & you make it accelerate even faster with it's original powerplant in modified form and you retain the kickstarter!
 
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also, after dropping about 50 lbs off of my bike, I was very VERY pleased with how well it handles and the additional acceleration.
 
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