Overbore kit for pre 98 750katana

[ThAzKat]

Would it be worth the money to go as large as 813cc on a Kat? Will I be able to keep my dependability?

http://www.wiseco.com/PDFcatalogs/ps04-suzuki.pdf

GSXR750 1988-89
GSX750F Katana 1989-97
Kit includes: (4) Pistons, Ring Sets, Wrist Pins, and Circlips
2.913" or 74mm R775 13:1 Cylinder boring only. 771cc 1mm oversize $499.51 Piston: 4449M07400 $124.88 (D3947) Rings: 2913XA Wrist pins: S531 Circlips: CW19
Stroke - 44.8mm (D37992) Optional Spring Steel Head Gasket: W6214
2.992" or 76mm CK142 12:1 Cylinder boring only. 813cc 3mm Overbore $565.60 Piston: 4789M07600 Rings: 2992XG Wrist pins: S531 Circlips: CW19
Stroke - 44.8mm (D63933) Spring Steel Head Gasket: W6023

[Anonymous]

The 1st part of Jan. my 93 Kat 750 is getting the 813 kit. We are going to dyno before and after the kit to see what the difference in HP & TQ. If you want to sit tight for a little while i'll be posting the info on the board

[Anonymous]

um no you dont want the 813 kit its not the most reliable kit for street riding the 771 kit is nice i had it done to my 92 kat 750 with a full system hanes and hines and a stage 3 jet kit i was making 105 hp and 68 ftlbs of torque at the rear wheel an im at 2300 ft above sea level in las vegas. plus i had the stock kat cams redegreed using slotted cam sprockets. if you need anymore info let me know. hell i think i still got my 771 kat motor laying around here somewhere.

[ThAzKat]

um no you dont want the 813 kit its not the most reliable kit for street riding the 771 kit is nice i had it done to my 92 kat 750 with a full system hanes and hines and a stage 3 jet kit i was making 105 hp and 68 ftlbs of torque at the rear wheel an im at 2300 ft above sea level in las vegas. plus i had the stock kat cams redegreed using slotted cam sprockets. if you need anymore info let me know. hell i think i still got my 771 kat motor laying around here somewhere.

Hey Sinful, where did you get the slotted can sprockets at?
Would I be better off fitting GSXR cams in my 93?

[Mr. Clean]

Thazkat you can take your factory cam gears to a good machine shop and have them slotted. As for 93 Gix cams, well I think that was the first year of the water cooled 750 Gix so they won't work without A LOT of machine work. Your best bet would be to locate a set of 88-89 Gix 750 cams. They drop right in your head. Keep in mind that in 1990 the 750 Gixxer head changed from the forked type rocker 1 lobe for 2 valves head (your head) to the shim type 1 lobe per 1 valve head. Suzuki only used this type of head for the 1990-1992 Gixxer and the 1990-1997 Katana 600's. Don't quote me on those dates I might be wrong but they are close. In 1998 Suzuki switched back to the forked type head on the Katanas because they were having to many problems with the shim heads.

[ThAzKat]

That is exactly what I meant when I said GSXR cams, the older ones. I agree the water cooled one won't work.
What year did the Katana change to shim? My 93 is the fork style, screw and locknut.

[Mr. Clean]

Your Katana is a 93 750 right? As far as I can tell the 750 never went to a shim type head, just the 600 in 1990. Of coure I could be totally wrong.

[Anonymous]

no your right on the kat 750 never used shims fromt he factory and the cam sprockets i used were 88-89 gsxr slotted sprockets from ape i think. and i used the 88-89 cams also.

[Mr. Clean]

sinfulkat keep an eye on those ape gears. I seem to remember them being made of a softer steel than the OEM gears. I have slotted OEM gears before with a drill press and a die grinder. It takes patience, a sharp bit, and sharp cutter.

[BearKat]

Oh Yeah! Pre-98 771 mod? Sweet!!!