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ohgoodtimes
Bore kit
Does anyone know where i could find one for my 83 750e? Also is it more practical (for cost, effort, etc) than doing the swap for the 700 pistons cams and so on?Tags: None
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Junkie
Effort will be basically the same either way. No clue about cost or effectiveness, it's gonna depend a lot on what compression ratio you go with and other stuff.
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QuaiChangKane
Timely question.
I don't know of any aftermarket big-bore kit for our bikes, and the 700 pistons will gain you nothing but a bit of extra compression.
I've heard that cams from the 1100 can be used for a greater power increase than the 700 cams, but can't remember if it's the 1100E/ES cams or the 1150 cams. Can someone shed some light?
I do seem to believe that someone made an 850 kit for the '83-up 750 at some point, but I could be mistaken.
-Q!
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Dizzixx
Direct from wiseco
GS750 1980-84 (4-Valve)Kit includes: (4) Pistons, Ring Sets, Piston Pins, Retainer Clips, and (1) CFM20 Head Gasket
816cc2.756" or 70.00mm K816 10.25:1 Cylinder boring only - 1983 GS750ED & GS750ESD must use modifi ed OEM Head Gasket
3mm oversize $577.33 Piston: 4188M07000 $135.71 Rings: 2756XC Piston Pins: S555 Retainer Clips: CW18
Stroke - 53mm CFM20 Head Gasket: W4937 $52.36 Optional Base Gasket: W6064 $14.04
I have their 844 kit for the 2 valve head and I am way wayyyy happy with it. I also have a built up B12 but I like the ol 750 better Its a much more pleasant ride but the power is there when I want it. PULLS VERY HARD all way to redline and beyond.
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Forum LongTimerGSResource Superstar
Past Site Supporter- Oct 2006
- 13962
- London, UK to Redondo Beach, California
I would think some added compression would make a sizeable difference on these engines...
Dan1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/
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ohgoodtimes
Hey dizzi are you using the stock cams or did you opt for aftermarket parts? I still like the 700 idea, i just have to price everything out.
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Junkie
Originally posted by Dizzixx View PostDirect from wiseco
GS750 1980-84 (4-Valve)Kit includes: (4) Pistons, Ring Sets, Piston Pins, Retainer Clips, and (1) CFM20 Head Gasket
816cc2.756" or 70.00mm K816 10.25:1 Cylinder boring only - 1983 GS750ED & GS750ESD must use modifi ed OEM Head Gasket
3mm oversize $577.33 Piston: 4188M07000 $135.71 Rings: 2756XC Piston Pins: S555 Retainer Clips: CW18
Stroke - 53mm CFM20 Head Gasket: W4937 $52.36 Optional Base Gasket: W6064 $14.04
I have their 844 kit for the 2 valve head and I am way wayyyy happy with it. I also have a built up B12 but I like the ol 750 better Its a much more pleasant ride but the power is there when I want it. PULLS VERY HARD all way to redline and beyond.
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The bores on the first generation four valve GS750 ('80-'82) and second gen four valvers ('83-'86) are the same, so the overbore kits are the same. Wiseco does say on their site that if you use the kit in a GS700, there is a modification that has to be made (a spacer I think) to allow added clearance below the valves due to different piston dome shape.
I may be doing this to my 700ES in the next year or two due to compression has fallen into the 130ish range on my bike. Still not bad, considering it has 61,000 miles on it.Last edited by Griffin; 04-18-2008, 02:20 PM.sigpic
SUZUKI: 1978 GS1000E; 1980 GS1000G; 1982 GS650E; 1982 GS1100G; 1982 GS1100E; 1985 GS700ES
HONDA: 1981 CB900F Super Sport
KAWASAKI: 1981 KZ550A-2; 1984 ZX750A-2 (aka GPZ750); 1984 KZ700A-1
YAMAHA: 1983 XJ750RK Seca
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Dizzixx
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