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will a 1981 gs850 motor fit?

  • Thread starter Thread starter kpkopelli1985
  • Start date Start date
K

kpkopelli1985

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hi. i have a 82 and also a 81 gs 650 and both motors are blown from years of abuse and i would like to know if a gs 850 motor would fit into either of these frames.
thanks
 
Won't fit, and please do NOT cross-post here.
 
kpkopelli1985 said:
hi. i have a 82 and also a 81 gs 650 and both motors are blown from years of abuse and i would like to know if a gs 850 motor would fit into either of these frames.
thanks
Click to expand...
No, but two 650's "blown from years of abuse" ? more info please .
 
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr.

You will find that this is a very active forum with many experts in all areas who are willing to share their expertise. There is no need to post the same incident in different sections.

As for your engine transplant proposal, it would be way more trouble than it's worth. Besides the different mount points in the frame and other frame mods, the driveshaft assembly is different. I'm not saying it's impossible but you'd better be really good at fabricating and modifying parts.

I suggest in the future you take proper care of your machines. The Suzuki GS is a very robust series of motorcycles and they will last 100,000 miles or more if you take care of them. Read all of the information contained in the links below for proper procedures and best practices.

Anyway, let me dump a TON if information on you and share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
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If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
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Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. Now let me roll out the welcome mat for you...

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Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff
 
Nope -- the 650 is physically a much smaller bike.
 
The other ? is what is actually wrong with the 2 other motors and what model 650, are they E or L models? as I recall don't the E's have a roller crank and the L's have a insert crank?I know I changed a motor on an L this past spring that supposedly ran on it's side after a low speed crash and it lost a bearing. It did have a bad bearing when I took the top end off for Steve
 
first let me say thanks for the answers and sorry for posting in more than one place and this is not to be a smart ass but does everyone have to pop my hands with the ruler? between the two posts like 4 people commented about that.
second... this is not my first account with this forum although it has been a couple of years (and a couple motorcycles) ago so i've read all those links around the forum except the external links basscliff. they helped me a lot cuttin my eye teeth with my gs bikes.
more info tom? age 18-24 no other vehicle except a motorcycle. wind rain sleet and hurricanes (i live in myrtle beach and hurricane part isn't a joke just has not been one last couple years for us). then you add in the spring and fall bike rallys with burn out contests and racing with friends... i've owned 4 different gs models. 2 survived and got passed on.
the 82 however i was in my first serious wreck on and the bike was totaled. i cut chopped and rebuilt it into a retro style chop that the older guys really didn't think i was old enough to be on. i rebuilt the top end but then the bottom end started with issues so i sacrificed my 81 stock parts bike (i also had running and on the road). that motor went out almost 2 years ago. now my brother has asked me to get the chop back runnin and i told him if i could it was his.
so is there any other gs motor that fits in that frame? also would i be able to swap the swing arm from a 850 for the driveshaft issue? the frame mods i can do no problem.
thanks again guys
 
hjfisk said:
The other ? is what is actually wrong with the 2 other motors and what model 650, are they E or L models? as I recall don't the E's have a roller crank and the L's have a insert crank?I know I changed a motor on an L this past spring that supposedly ran on it's side after a low speed crash and it lost a bearing. It did have a bad bearing when I took the top end off for Steve
Click to expand...

the 81 motor i'm pretty sure is a 650 gl and the 82 was a 650 e.


does anyone close to me have one of these bikes for sale? lol
 
kpkopelli1985 said:
the 81 motor i'm pretty sure is a 650 gl and the 82 was a 650 e.
Click to expand...
Two radically different engines, even though they look very similar.

Easiest way to tell is to look between the engine and the rear wheel.
If there is a chain that drives the wheel, it's an "E" model.
If there is a shaft that drives the wheel, it's either a "G" or a "GL" model.

To determine whether it's a G or GL, look at the following items:
Front fork - L has leading axle and two disk brakes
Front fender - L is chrome, G is painted
Headlight size - L is 6", G is 7"
Handlebar shape - L has longer pull-back bars
Tank size and shape - L has 3.5 gallon peanut tank, G has larger tank, about 4.3 gallons
Seat shape - L has stepped seat, G is flatter
Tail light - L is separate unit on fender, G is just under the tail cowl
Rear fender - L is chrome, G is black plastic
Muffler size - L pipes are shorter, ending ahead of the axle

Back to your original question: the 850 is a much bigger engine and would not fit in the smaller 650 frame.
If your 650 is an E, with chain drive, you will have to do further modifications to the swingarm area to accommodate the shaft drive.

Regardless of your fabrication skills, I really doubt that the effort would be worth it.
You would be better off making your own frame from scratch or, better yet, find another bike or frame.

.
 
kpkopelli said...."more info tom? age 18-24 no other vehicle except a motorcycle. wind rain sleet and hurricanes ........"

I'll pass this info along to my daughters.
Anyways,a few 650 shafty blocks on ebay still (pickup only)- in Michigan area as I recall- why not rent a car and plan on a winter vacation to experience new weather!
 
Steve said:
To determine whether it's a G or GL, look at the following items:
Front fork - L has leading axle and two disk brakes
Front fender - L is chrome, G is painted
Headlight size - L is 6", G is 7"
Handlebar shape - L has longer pull-back bars
Tank size and shape - L has 3.5 gallon peanut tank, G has larger tank, about 4.3 gallons
Seat shape - L has stepped seat, G is flatter
Tail light - L is separate unit on fender, G is just under the tail cowl
Rear fender - L is chrome, G is black plastic
Muffler size - L pipes are shorter, ending ahead of the axle



.
Click to expand...
I must have a Frankenbike!
leading axle with single caliper, narrow handlebars, 3.5 gal tank, but mufflers end 6 inches past axle and they are stamped gs650 GL
 
sorry tom... i'm recently married so doubt my wife wants that passed on lol.
both bikes are g's or gl's. they both have drive shafts.

so is there any type of motor that will fit or is it only the 650's?
thinkin it may be time to break down the two motors and see what parts i can combine. really hoped to find somethin i could put in already runnin.
 
tom203 said:
I must have a Frankenbike!
leading axle with single caliper, narrow handlebars, 3.5 gal tank, but mufflers end 6 inches past axle and they are stamped gs650 GL
Click to expand...
Sounds like an "L".

Changing the handlebars is a very common change.

I was guess on the length of the mufflers. They are shorter on the 850s, I was assuming that they were also shorter on the 650.
The only 650 I have here is an "L", but has a 4-into-1 pipe on it, so I don't know for sure.

.
 
If it is a 650 E chain model you might be able to stick a 550 motor in it but not sure. Someone will chime in and correct me I'm sure
 
I am not sure but perhaps you could rebuild one of them using a 750 cylinder and pistons?
You would gain about 60-75 cc's in the rebuild. ;)

Daniel
 
both have drive shafts. so chain drive bikes are not.... unless i can fit the swing arm from the bike as well.
so will a 550 bolt in or is there any motor that will bolt right in the 650g frame? would the swing arm be close? if it is i can do some frame mods to make it work. i've raked and chopped enough frames i'm not afraid to cut and chop.

as to rebuilding with 750 parts thats putting me back where i am now+a few cc's. i rebuilt the top ends on each motor i have while it was in the bike and eventually pulled the top end off one to put on the other. problem now is the bottom end on both.
so what i have is one complete motor and one bottom end with a box of top end parts. if i'm trying to combine motors i could possibly get one good one but i'm a little over my head when i get into the bottom end of these motors and my bike guru moved. a bolt in solution with minimal modification needed would just be more up my alley.
 
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