[HemiKat]

(Why do I even care? Ive got a B12 now....)

[loudnlow7484]

(Why do I even care? Ive got a B12 now....)

Because a dot head + a b12 + gsxr cams = OMFG!

[HemiKat]

Because a dot head + a b12 + gsxr cams = OMFG!

Ill let MD86 do that one. I never used my 750 to its full potential so Im thinking Ill probaly kill myself with the B12 anyways.

[loudnlow7484]

Ill let MD86 do that one. I never used my 750 to its full potential so Im thinking Ill probaly kill myself with the B12 anyways.

Stop being such a wussy..... you NEED 130+ rwhp, admit it!

[Psycho1]

L&L, you keep mentioning grey painted heads, but every GSX-R pic and broshure I've found online from 85-91 clearly shows the entire engines are black not grey. Wazzup with that? lol

[loudnlow7484]

L&L, you keep mentioning grey painted heads, but every GSX-R pic and broshure I've found online from 85-91 clearly shows the entire engines are black not grey. Wazzup with that? lol

I owned one, they are gray, whether or not they look that way in pictures. Mine was an 86, btw. It's not like a silvery-gray.... it's dark grey, but the kat engines are BLACK.

Here.... compare......

86 GSXR engine- http://cgi.ebay.com/ebaymotors/1986-...item563737f247

Katana engine - http://cgi.ebay.com/ebaymotors/88-Su...item1e5a88255c

[ThAzKat]

I owned one, they are gray, whether or not they look that way in pictures. Mine was an 86, btw. It's not like a silvery-gray.... it's dark grey, but the kat engines are BLACK.

Here.... compare......

86 GSXR engine- http://cgi.ebay.com/ebaymotors/1986-...item563737f247

Katana engine - http://cgi.ebay.com/ebaymotors/88-Su...item1e5a88255c

that gixer engine is surely well weathered but I do agree that the 1985 -1987 gixer engines were a dull black or dark grey!
I also agree about a S-1 head on a 1127/1200, but the 1127 dyno's at 130 already so 140-150 with the S-1 head and better cams.
most guys that do the S-1 on a 600 also go with the big bore kit so clearance is no issue.

[Psycho1]

That 86 head looks like mine.

[ThAzKat]

That 86 head looks like mine.

I was wondering why mine would never shine up like all the other katanas I have seen

[loudnlow7484]

that gixer engine is surely well weathered but I do agree that the 1985 -1987 gixer engines were a dull black or dark grey!
I also agree about a S-1 head on a 1127/1200, but the 1127 dyno's at 130 already so 140-150 with the S-1 head and better cams.
most guys that do the S-1 on a 600 also go with the big bore kit so clearance is no issue.

130 rwhp on a stock 1127 sounds optimistic.

I think we've had this dyno vs dyno conversation before........ Each one is different. Dale Walker puts a stock B12 at 100hp on a Dynojet 150. He puts them at 120hp with pods, a full exhaust, and jetting. Given that math, I'd say 130-135 would be reasonable with a dot head and decent cams. The 1127 already has good cams from the factory, so it should put out more than a B12 box stock, but not 30hp worth!

Granted, Dale Walker's dyno is a touch more conservative than most, as I don't believe he uses "corrected" numbers. The numbers he uses are what the bike actually puts to the ground. For example, Sport Rider dynoed an 05 GSXR1000 at 162, while Dale Walker dynoed it at 153. Sport Rider uses "corrected" numbers to account for atmospheric conditions. The bike never actually put down 162 rwhp, they just believe it COULD under perfect conditions.

Sorry for ranting..... I have a bone to pick about dynos, I guess. That's why I prefer the track to really get hard numbers. There is no variance in timing lights.

That 86 head looks like mine.

I'm assuming you have the katana CV carbs? If you pull them off the head, and look into the boot, you can tell. Because the 86-87 GSXR came with smaller carbs and ports, the CV carb boots won't flow smoothly into the head. There will either be a ridge where they meet, or there will be obvious port work done to it to make them meet smoothly.

that gixer engine is surely well weathered but I do agree that the 1985 -1987 gixer engines were a dull black or dark grey!

BTW- the 88-89's are gray too. I actually first noticed the difference because a coworker of mine rode a 1989 GSXR750, and I noticed it on his bike. I don't have any idea about the 90-92 models, though. I've never seen one up close enough to notice.

here's an example- http://cgi.ebay.com/ebaymotors/SUZUK...item335aa76d5c

[Psycho1]

The intake ports look untouched, but are slightly larger than the 600 intake manifold ID.

[loudnlow7484]

The intake ports look untouched, but are slightly larger than the 600 intake manifold ID.

Hmmm..... Larger ports, you say? Well, if you say this would have been done around 90-91, it could well have been a 90-91 750 head, though it would have been pricey at the time (but if it was somebody serious about performance, it was the best long-stroke 750 head ever made, so maybe).

Does it feel a lot faster than a 600 should be? Like 65hp vs 100 hp?

[Psycho1]

I ran into the original owner a month after I bought the bike from a local stealership, and he claimed when he was racing it at mid Ohio he had a friend that worked for Team Suzuki. He claimed his friend took the engine in to work and it dyno'd 80hp stock, then after modding (shaved head, supposedly race cams, jetting) supposedly it hit 105hp on the same dyno. He claimed the head was ported, but looking inside now with the engine out of the bike that doesn't appear to be true, just a head swap, and likely different cams of some type. It does seem to run a lot stronger than any other 600 Kat I've seen. I can hang side by side with a friends 03 R6 from around 60mph to 130mph or so before he finally pulls away from me, and we are about the same weight.

[md86]

130 rwhp on a stock 1127 sounds optimistic.

That's the number I've seen from a few different sources , http://www.motorcyclespecs.co.za/mod...r1100%2090.htm actually has it listed HIGHER than that (the 40mm carbs seem to make for almost 10hp over the 36mm equipped bike) , and one site that had comparos of the stock GSXR vs his modified bandit . Not that I've been looking around getting ideas or anything ...

[ThAzKat]

That's the number I've seen from a few different sources , http://www.motorcyclespecs.co.za/mod...r1100%2090.htm actually has it listed HIGHER than that (the 40mm carbs seem to make for almost 10hp over the 36mm equipped bike) , and one site that had comparos of the stock GSXR vs his modified bandit . Not that I've been looking around getting ideas or anything ...

I have seen the GSXR listed at 149hp all over the place, stock. The Katana 136 hp, stock. That is the GSXR 1127 engine!