www.kzrider.com/forum/2-engine/594888-mo...rks-exhaust-opinions

Third post down, the yosh replica they make, I havent tried contacting them about it, but when i get in the market for an exhaust that's what I would go for

Motogpwerks was building stainless yosh replicas (with yosh's permission) for something like $400, do a forum search kapahauhula (or whatever his screen-name is had one)

Dunno if/when they'll do it again tho

Motogpwerks?

SeattleKZ wrote: Sancuary uses the coolest pipe ever made on most of their bikes. I think you need a Japan hook up to get one.
www.ac-sanctuary.co.jp/rcm-list/gallery/zephyr/rcm181/


I have a Motogpwerks on my KZ900, I think it's the 2nd runner up. Stainless Steel and around $500

Love your seat.

It's been months in the making because I don't have a huge budget and sometimes things get halted while waiting for the cash to get the next part. I'm still not done yet but 1 or 2 more Dyno runs and it should be.

I bought a 1976 KZ900 that wasn't running right and it turned out to be the PO put in new rings but did not hone the Cylinders correctly so it had low compression. I could have just honed the cylinders and got new rings but I am not that kind of guy. Instead I decided to pump it up a little.

After some researching and price checking I sent the cylinders and head to Pitstop Performance. Joe went over the valves, cleaned up the ports a little, dropped in some APE 410 cams and bored the cylinders for the MTC 1015 pistons.

I got the top end back together and all the gaskets leaked, still don't know why but the second attempt was successful. The bike ran pretty shitty with the stock carbs sucking air through pod filters and the 4into1 Motogpwerks race pipe so I started messing with jet sizes.

I settled on a 17 pilot and 120 mains and the needle in the center position. The bike ran pretty good but was lean on top and I could tell it was short some hp. That was early summer, the bike ran good enough I put a over 1000 miles on it.
Recently I took it to a dyno to get it sorted beyond the "seat of my paints plug chops" and guess work. Now I have real data, which pretty much proves that all previous advice given to me on forums and chats at bike gatherings was wrong. The first run the bike was so lean my buddy (dyno owner) let off the throttle early and the dyno only showed the bike making 62hp.

I can't remember the a/f mix's exact ratio but it was way above the 13% you want to make maximum power. Based on my friend's dyno experience he suggested I go up to 130 mains and down to 15 pilots. Due to a mix up when I ordered my jets I ended up putting in 132.5 mains and swapped the pilots to 15. I did a plug chop in 4th gear doing about 80mph and the plugs still looked a little lean. I had ordered every size of jet up to 140 though because the 1st run on the dyno proved to me science will tell you the answer and friends are not science. I went back to the dyno with the 132.5 jets in and it produced 86hp. Yes, over 20 hp gained from changing from 120 to 132.5 jets. The a/f mix was still off so I put in 140 mains and moved the needle 1 notch lean. Then bike produced 89hp but the needle move was a bad decision so I moved it back to center notch and tried again.

With 15 pilots, 140 mains and needles in the center position the bike currently makes 92hp at the rear wheel with a 16% A/F mix. I ordered bigger jets and and plan to go back to the dyno again and get that mix to 13% at wide open throttle.

This is real data and I wanted to post it here so if anybody else builds a similar engine they can get their jetting real close before running it on a dyno 5 times.
I will post my final setting and final power when it's done. I also plan on making some timing adjustments to the electronic ignition once the carbs are dialed to see if I can squeak a few more hp's.

Sancuary uses the coolest pipe ever made on most of their bikes. I think you need a Japan hook up to get one.
www.ac-sanctuary.co.jp/rcm-list/gallery/zephyr/rcm181/


I have a Motogpwerks on my KZ900, I think it's the 2nd runner up. Stainless Steel and around $500

ScottyKZ1000A2 wrote: I'm probably going to go with a custom swingarm. not sure which one just yet

MotogpWerks is now producing swing arms. You may want to check them out. He bought the old "CALFAB" name. His exhaust pipes are awesome. Here are a couple of links

www.facebook.com/photo.php?fbid=10203967...90317&type=1&theater

www.facebook.com/motogp.werks/posts/90144813653817

Contact info (714)223-0111
RED@MOTOGPWERKS.COM

kaw-a-holic wrote:

mtbspeedfreak wrote: Hey folks,

I had to get confirmation that MotoGP Werks was remanufacturing Cal-Fab swingarms as seen in this article: www.motorcycle.com/top10/top-10-things-motogp-werks.html/8

Red got back to me, and yes indeed, he purchased the company and Cal-Fab swingarms are being manufactured once again!!!

The article is true, the price will be $599. A 150-series rear tire will fit easily.

Right now, they're only manufacturing a disc brake version for Z1s, unless they get 5 to 8 pre orders for the drum version. I'm interested in a drum brake version as I like the lines of the drum on the back of an old KZ, and I do not plan on ever doing a track day on the old bike.

I wanted to put out a feeler to see if anyone else was interested in a drum brake version as well. Let me know if you are!

Thanks!

Oops, sorry guys I thought you already new this. He started with the Gixxers and is now making one for the KZs.

Haha yeah, this is news to me! I've been concentrating on my ZRX lately, but as I finish the mods I intend to do to that, I'll start focusing on my KZ again. Miss my old gal!!!

mtbspeedfreak wrote: Hey folks,

I had to get confirmation that MotoGP Werks was remanufacturing Cal-Fab swingarms as seen in this article: www.motorcycle.com/top10/top-10-things-motogp-werks.html/8

Red got back to me, and yes indeed, he purchased the company and Cal-Fab swingarms are being manufactured once again!!!

The article is true, the price will be $599. A 150-series rear tire will fit easily.

Right now, they're only manufacturing a disc brake version for Z1s, unless they get 5 to 8 pre orders for the drum version. I'm interested in a drum brake version as I like the lines of the drum on the back of an old KZ, and I do not plan on ever doing a track day on the old bike.

I wanted to put out a feeler to see if anyone else was interested in a drum brake version as well. Let me know if you are!

Thanks!

Oops, sorry guys I thought you already new this. He started with the Gixxers and is now making one for the KZs.

Hey folks,

I had to get confirmation that MotoGP Werks was remanufacturing Cal-Fab swingarms as seen in this article: www.motorcycle.com/top10/top-10-things-motogp-werks.html/8

Red got back to me, and yes indeed, he purchased the company and Cal-Fab swingarms are being manufactured once again!!!





The article is true, the price will be $599. A 150-series rear tire will fit easily.

Right now, they're only manufacturing a disc brake version for Z1s, unless they get 5 to 8 pre orders for the drum version. I'm interested in a drum brake version as I like the lines of the drum on the back of an old KZ, and I do not plan on ever doing a track day on the old bike.

I wanted to put out a feeler to see if anyone else was interested in a drum brake version as well. Let me know if you are!

Thanks!