Building a GPZ1150 from a CSR1000

They do. They make a 1133 and a 1166. I can also get them from Wiseco, which I can get at dealer cost. I also believe MTC also has a set or two. These are respectively 74 & 75mm bore. Mine are 74.5mm and are "cast" pistons. Cast pistons are much better for street use because they have a much more even thermal expansion and contraction. The Aluminum alloy is also higher in Silica in the cast pistons, which even though it makes them more brittle, they were much better. Besides it's more fun to have something different.:silly:

Otto

wow! Wow! wow! WOW...did i mention wow......gives me all kinda ideas for when i pull the 76 motor in mine......very nice build thread and ...i'm a fan oh this bike......at first i was like "why build one model from another model???" but now......"one of a kind"!!!!! is what i'm thinking........thanks craig...fun build ... and great photos

Talking about different; this is the same reason I am staying with CV carbs. But I am using 36mm BS36 carbs like used on the Suzuki GS1150 and the Yamaha FJ1200. The only thing I have to do is figure how to efficiently fit them behind the head and not loose any flow efficiency due to odd spacing and jury-rigged boots. I will have to do some inventive machining on the carbs to fit them into a Kawasaki spacing-bar.

Otto

otakar wrote:

Talking about different; this is the same reason I am staying with CV carbs. But I am using 36mm BS36 carbs like used on the Suzuki GS1150 and the Yamaha FJ1200. The only thing I have to do is figure how to efficiently fit them behind the head and not loose any flow efficiency due to odd spacing and jury-rigged boots. I will have to do some inventive machining on the carbs to fit them into a Kawasaki spacing-bar.

you can put a bulb from each manufacturer in each seperate lighting fixture as added secret case some one tries saying they seen this done before...hahahahahahaahaahaah

Hay Craig; I envy you your pipe on your 900. I love the old Yoshimura and Yoshi stile pipes. I know I can still get one like that from Kerker but not for the price they want. The MAC pipe is close and sounds great, flows well too but they are made of real thin metal and the finish is not too god. I am thinking of making my own pipe that resembles the one you got. as far as the "One of a kind", it just turned out that way. I just wanted a 82 GPz1100 and could not find one, "So I Built One" (or at least something that looks like one)

that is a supertrapp...and when i got back in the z game two years ago ...i had my memory/heart set on a kerker(still do)but YIKES momma was on my butt.... no 600 purchases right ofF the bat......i got this from a guy in oregon off e-bay and bid up to 289.00 i think....but it sanded and painted and polished ...really nice...it has tunable disks that can be added or taken out ..no dents or scars...a polished can and polished & engraved cap with 4 allen holders and is really nice in sound and clearance of filter and speed bumps it is great....nice bends...could not touch it in quality under 500.00...it was a higher power thingy the way it happened for me... and i love it now.....i would "highly"recomend a supertrapp to anyone and would dyno it any day against the yosh or kerker... and with my dyna and smoothbores it is now a matched set... it's the only one i have seen on a 900 with correct mounting peg spot.....gpz-1000j mounting ones are more common...thanks....craig

here is a shot of it

I have a standard Kerker on my GPz but I was never a Megaphone person. I always liked un-tapered ROUND canisters, the smaller the better. Ja-Wana-Swap???? Dose this pipe let you keep the center stand?

otakar wrote:

I have a standard Kerker on my GPz but I was never a Megaphone person. I always liked un-tapered ROUND canisters, the smaller the better. Ja-Wana-Swap???? Dose this pipe let you keep the center stand?

i 'll pass on the swap ...but thanks ..i cosidered it for sec...yep keeps the cntr stnd......my old kerkers and most i've seen sound wicked when you run just the cap...but seem to scrape the speedbumps and such and get dented under...can't ever see the dents ..but they kinda bug me......yoshis ar sweet i had one and it sounded real racey....low profile bad to the bone pipes....got a 1000j needs one somedaylolpeace...did not mean to thread jack...love your bike man....keep the pics coming...

i got some head port questions...i'll pm you soon craig

Only a thought, There was a Yoshi mini pipe vintage 1978 on eBay last week it went fore for almost $400, and it was not like new. I do like the MAC pipes as I mentioned, they sound just like the old Yoshi. Matter of fact when I talked to MAC last year, they told me that in the old days they used to make the Yoshi pipes for them. Imagine that:S If you have questions you can email me directly at otto@condormodels.com or at work during the day at otto.kudrna@pdt.com I am at work from 0515 CST to 1500 5 days a week. If I do not have a chance to answer you from work I forward the email to myself at home and do it from home in the evening.

Otto

Just wondering if fuel injection has enterd your mind. That would be a big improvement in all areas. Way better fuel mileage, and low end throttle response, and
Oh So Cool, to match an OH SO COOL project..

I have two complete FI systems just sitting around but the FI is too restrictive. At this time, you can still get more out of propperly set up carbs than FI.

Otto