85 GPz750 Refresh Project

Irish- I agree with Steve here on the pilot jets. I'm running a stage 3 jet kit on my 650 (bored to 720, 4-1 header, pods), and I had to bump up to 17.5 pilots from the stock 15's. Your bike is doing what mine did- it would run ok at idle, but the second you laid into it off idle until the needle/mains started to pick up, it had a HUGE lean stutter to it. I swapped the 15's our for 17.5 pilots, tuned up the pilot circuit with my colortune unit, and that solved everything. Starts super fast, pulls hard and smooth from idle to redline. It's a quick and worthwhile little tune. If I were you, I'd swap your pilot jets up a size from where you're at. Just my input

Devin

650mod wrote: Irish- I agree with Steve here on the pilot jets. I'm running a stage 3 jet kit on my 650 (bored to 720, 4-1 header, pods), and I had to bump up to 17.5 pilots from the stock 15's. Your bike is doing what mine did- it would run ok at idle, but the second you laid into it off idle until the needle/mains started to pick up, it had a HUGE lean stutter to it. I swapped the 15's our for 17.5 pilots, tuned up the pilot circuit with my colortune unit, and that solved everything. Starts super fast, pulls hard and smooth from idle to redline. It's a quick and worthwhile little tune. If I were you, I'd swap your pilot jets up a size from where you're at. Just my input

Devin

Awesome thanks a ton Devin, that input really helps along with Steve's and that is where I will head to as soon as I am able to order the new ones. I will check Z1E, but can't quite remember if I saw pilot jets there. Know I saw main jets since that is where I got mine but will see. Where did you get your pilots from, Z1E as well?

Thanks,
Brett

We are packing up and about to start our move from Longmont, CO to Loveland, CO starting this coming weekend and I ended up tripping across a bike pic from the early 90?s. Back when I was still a little ankle biter my Uncle Fletch had a ZX-10 Ninja which is the first motorcycle I can remember and left quite the impression! I found the pic of his and it is one of the biggest inspiration for why I was so enthralled by these bikes and ended up with one myself that is similar to it. Thought it would be slick to see the very first bike I remember when I was still 6 years old or younger

Thanks,
Brett

Brett- I have a local kawi shop in my town that I just swing by and they get the carb toolbox out for. I'm lucky in that sense- they have any and all mains, pilots, clips, etc for the mikuni carbs. Hopefully you get some soon.

Devin

650mod wrote: Brett- I have a local kawi shop in my town that I just swing by and they get the carb toolbox out for. I'm lucky in that sense- they have any and all mains, pilots, clips, etc for the mikuni carbs. Hopefully you get some soon.

Devin

Thanks Devin, appreciate the reply and well wishes

Brett

Well due to the move not a lot of progress and absolutely NO money to spend on the bike right now but have made a few small steps here and there that I figured I would share…. Broken up into a few posts since these are pic heavy and I can only load 4 pics per post that I have found.

One thing was that I was able to figure out the final step to finish off the fueling and lean out conditions with the new K&N filter. I need to step up one size in the pilot jets as Steve suggested. Stock sizing is #37.5 so need to step up to #40's there. Oddly enough I cannot find any pilot jets let alone #40's on Z1E for the BS34 carbs, I can find it for other carb types but not the BS34's, huh…

Also pulled the plugs since they have had some miles put on them and can peek and see how Saya is burning, have to say she looks great! Each plug has the jug number it was pulled from written behind it on the shop towel in the pics:

Continued…

On another front there has about a 1.5" X .25" tear in the seat and was slowly growing that I wanted to fix. So a bit of masking off and some Shoe Goo product applied with some time to cure and fixed… came out pretty darned good for a spot treatment fix until I recover the seat in a custom cover.

Here is a pic of the seat masked and wet with the Shoe Goo:

And after it set and done:

My buddy who is building and constructing the customs fender eliminator that I patterned and designed is making some progress as well and is working on the tail light box that bolts to the underside of the new rear fender delete I designed:

Lastly, got plates on it yesterday and registered and titled in the new county that we have moved to! The new house is a large duplex with much more space and much nicer than where we are currently at, huge back yard and good size front yard and is in a family neighborhood. Best of all, for the very first time ever I have a garage and it fits all of my tool chests, the bike, shelving and storage, work bench AND the car inside the single car garage and can walk around everything even with the door closed and everything loaded into the garage! Here’s a few shots of the garage for how it is currently organized and decorated:

Lastly, got the 2nd most important part (1st being the garage of course ) of the house setup, the almighty liquor cabinet is moved over and ready for me to pour a celebratory bourbon when we start sleeping at the new place on the 14th When I put in my signature that I was a “bourbonr” I wasn't kidding… whiskey is one of the few hobbies that I have. Whiskey, bikes, cars, cigars and guns/knives are my hobbies and you can see just what a whiskey collector and fan I am LOL, those bottles are 3-4 deep on each shelf so the cabinet is at capacity

Irish-Kawi wrote: Well due to the move not a lot of progress and absolutely NO money to spend on the bike right now but have made a few small steps here and there that I figured I would share…. Broken up into a few posts since these are pic heavy and I can only load 4 pics per post that I have found.

One thing was that I was able to figure out the final step to finish off the fueling and lean out conditions with the new K&N filter. I need to step up one size in the pilot jets as Steve suggested. Stock sizing is #37.5 so need to step up to #40's there. Oddly enough I cannot find any pilot jets let alone #40's on Z1E for the BS34 carbs, I can find it for other carb types but not the BS34's, huh…

Also pulled the plugs since they have had some miles put on them and can peek and see how Saya is burning, have to say she looks great! Each plug has the jug number it was pulled from written behind it on the shop towel in the pics:

Lean. If you run it that way too long you start burning oil thus the black on the plugs. I'd get the larger pilots ASAP.
Steve
jetsrus.com/a_jets_by_carburetor_type/a_...kits_a_selection.htm

Thanks Steve, took a peek at the site you sent and when I pulled up the pilot jets for the BS series carbs ( saw a listing for BS30/90 but not BS34 so had to search a different way) there are two types of pilot jets, no cross drilled holes and cross drilled holes in shaft. Without pulling the pilot jet out of my carb which is a pain, how would I know which I have since I can't find a mention of it in the FSM for that??? :blink:

Thanks,
Brett

Send them a e-mail.
Steve

Well got a few hours of time working on the bike last night, first night in the new garage working on it too :woohoo:
First off, man oh man it is a dream being able to wrench on my bike in my own garage for the first time ever, that was seriously sweet and very rewarding But onto the progress!

So I decided that since funding was kaput for right now that I would spend my time rubbing, buffing, sanding etc and making Saya glow once again. So I started by stripping her down... tank off, seat off, underbelly off, side covers off, mid fairings off, and even coils off lol. After I spent about a half hour stripping her down I was finally at my starting point for the evening. Decided I would start in on stripping the head, jugs and rocker cover among other things to prep for paint, and this is where I started at:

Not terrible but definitely showing her age and patina with the faded, flaking or even missing paint there. Doubtful most people notice and most would also probably not be bothered by this but it drives me nuts every time I see it, must be that annoying OCD rearing its meticulous head again :silly:

So, chucked up some wire wheels in my drills (baby drill and big boy drill lol) and went after the cases after I had sprayed em all down with Simple Green and scrubbed them like crazy with a tooth brush, man that is tedious work :pinch:

Continued in next post for picture limit reasons (too many links)