Late 70's 750 converting to 1000cc?

[ToddB3]

Hey guys,

Just wondering if anybody out there knows if it would be an easy task to install GS1000 cylinders and head to my 750's bottom end? I've found a junk yard close by that has a 1000cc engine with a cracked bottom end but the cylinders and head look OK and thought for the price if I didnt have to do any major milling on the bottom end to fit it would be some cheap ponies.

[humhead]

1000 cylinder blocks do not fit a 750. your best bet for a power increase is a wiseco 850 kit. If you must have 1000cc, you have a couple of choices. Find a good 1000 motor & mount it in the 750 frame OR Find a good running GS1000.

Terry

[ToddB3]

I should have figured that, do you know of a good place to start looking for a 850cc piston kit?

[Hap Call]

I should have figured that, do you know of a good place to start looking for a 850cc piston kit?

http://wiseco.com/

They make a 844cc kit that is a 2 mm overbore at 10.25 compression ratio. MSRP is $440.19 but dealer cost is $264.13 so you may be able to negotiate with a local motorcycle speed shop and get a better deal. I did that and got it for 20% over dealer cost plus shipping.

Hap

[KW]

It's a 4mm overbore. 750's are 65mm - 850's are 69mm

[massakins]

Hap, don't give away all of my secrets.....

[Flatline_Racing]

http://www.pro-flo.com/pro-flo_wiseco_suzuki_big_bore_kits.htm

$365.95

[terry]

It's always a bit of a gamble, but for that kind of money you may well find a good running GS1000 engine on ebay etc (preferably the 1980/81 big port engine) which is a simple fit in a 750, (longer rear mounts need to be fabricated, but that's not a big job) and a big increase in power. If you still want "more power", spend the money on a Wiseco 1085 or 1100CC kit! Cheers, Terry. :twisted:

[ToddB3]

That thought had already crossed my mind, I could probably find a 1000cc engine that needs new rings and valve seals and still come out ahead in horsepower and money than the 850 kit. I'm sure that the electrical harness from the 750 will probably work on the 1000 also, please correct me if I'm wrong.

[earlfor]

Hmmm, guess it depend on how you look at it. Seems that taking off 2mm all the way around would do it. :-)

Earl

It's a 4mm overbore. 750's are 65mm - 850's are 69mm

[Hap Call]

Hap, don't give away all of my secrets.....

Sorry about that Pat!

Hap

[SOS]

8) Is the 79GS 750 and 1000 on the same frame? 8)

[Hoomgar]

I'm pretty sure they are identical.

[humhead]

Is the 79GS 750 and 1000 on the same frame?

NO! They may look similar, but they are different. You can see for yourself by looking at the parts fiche at alphasports website.

Terry

[Anonymous]

is the 1000 engine heavier or wider then the 750 engine? How does putting a 1000 engine in a 750 affect handling and such...obviously its more powerful but at what cost?