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Go Back   FZ1OA Message Board > FZ1 & Fazer Owners Association > Exhausts, Carburetion & Performance > Gen 1 Exhausts, Carburetion & Performance

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Old 02-24-2018, 05:04 PM   #1
Chik'Tikka
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Quick question about Ivan's jet kit

At the moment i plan on running the stock header with a slip on for the next year or so, but i do plan on eventually getting an aftermarket header (like the Holeshot one).

My question, if i get Ivan's full system jet kit, is it usable without too much loss with a slip on only? Or do i have to buy the slip on kit for now and get the full system kit in the future for a header upgrade?

With regards, Chik"Tikka +^_^+
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Old 02-24-2018, 05:15 PM   #2
treeguy
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MB kit.
Keep the EXUP.
It's awesome. 90k on mine.
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Old 02-25-2018, 07:04 AM   #3
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To each his own but I don't recommend full exhaust unless you are planning to spend a lot of time keeping the engine 8k plus on the rpm meter. You will only gain fractional hp on top with full exhaust and will lose plenty of torque where you need it most due to the loss of the Exup.

My recommendation, rather than spend for the full exhaust, is to spend on the engine mods I recently completed and documented on the site in the "Facts as I know them" string:

-Use Ivan's MB jet kit and AIS eliminator if you haven't already
-Port match the carb boots (this is easy Dremel work)
-Perform Ivan's air box mod and use high flow filter (again, easy Dremel work)
-Swap the head gasket if you are mechanically inclined. Many have used the R1 gasket. A couple of us have used the thinner custom Cometic gasket as it bumps compression even more and works great. I listed the part number in the thread as did Longeze.
-Get rid of obvious flashing in the intake and exhaust portions of the head. Slight touch up with the Dremel will go far.
-Polish your valves. Easily done with drill or drill press and a little compound and fine grit sand paper.
-Take the effort to get your valve clearances very tight/little variation using Ivan's recommendation. I ended up at .0051 to .0055 inch (.13/.14mm) clearance for intake and .0083 to .0087 inch (.21/.23mm) on the exhaust.
-Final step would be to hand time the cams. Not as hard as it sounds. I think I ended up at 106/100 intake/exhaust.

I don't know if you've seen the thread but doing these things to my bike has pushed output to 160 hp at the crank, 140 at the rear wheel - documented on the dyno with before and after runs. Loads more hp and torque everywhere in the power band, not just at the top.

Good luck as you decide. Let us know what direction you go and how your mods turn out.

http://www.yamahafz1oa.com/forum/sho...141091&page=11

Best,
Ron
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2003 Blue FZ1 - Ivan's MB Jet kit, Akrapovic, GOEC w/remote and GPS, 07 R1 fork conversion w/6 pot brakes, R1 master cylinder, R1 rear wheel w/R6 caliper, Penske shock, Dirt Road seat, AIS removed, HID and LED lights, full Givi luggage, Galfer lines, chain oiler, Rizoma bar, cat-eye turn signals above headlights, grip heaters, factory lower fairings, air box mod w/high flow filter, Cometic thin head gasket, FazerPhil large gas tank mod (in progress).
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Old 02-25-2018, 07:56 AM   #4
klj7734
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Ivan's MB jet kit was designed to be used with full exaust headers.
You'll need his SO jet kit if you keep the exup or if you decide to go with his MB jet kit and a slip-on you will need to port the boots.
He explains it all very well on his website:

http://www.ivansperformanceproducts.com/fz1.htm
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Old 02-25-2018, 08:36 AM   #5
Ivan
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Quote:
Originally Posted by Chik'Tikka View Post
At the moment i plan on running the stock header with a slip on for the next year or so, but i do plan on eventually getting an aftermarket header (like the Holeshot one).

My question, if i get Ivan's full system jet kit, is it usable without too much loss with a slip on only? Or do i have to buy the slip on kit for now and get the full system kit in the future for a header upgrade?

With regards, Chik"Tikka +^_^+



Do the MB kit (MB stands for modified box)

Port the intake boots to take full advantage of the airbox mod, it works great with the stock header and slip-on.

I need to update my web page for more clarity on application... For the record, kit application goes by intake restriction.


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Old 02-27-2018, 12:17 PM   #6
Bad Moon
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I have the MB kit with slip-on, air filter, modded box and boots as specified by Ivan. Runs great.
BTW, I don't know if anyone currently makes and sells a header for the FZ1.
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Old 02-27-2018, 01:18 PM   #7
theunderfighter
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Quote:
Originally Posted by Bad Moon View Post
I have the MB kit with slip-on, air filter, modded box and boots as specified by Ivan. Runs great.
BTW, I don't know if anyone currently makes and sells a header for the FZ1.
They don't.
A Gen1 header comes up rarely, and goes quick in the classifieds.
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Old 02-28-2018, 01:25 PM   #8
Quisp
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Quote:
Originally Posted by Bad Moon View Post
I have the MB kit with slip-on, air filter, modded box and boots as specified by Ivan. Runs great.
BTW, I don't know if anyone currently makes and sells a header for the FZ1.
Dale walker sells one and Hindle had a blow out sale recently , Black Widow also makes one. I have a new Black Widow never used I would make a deal on .
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Old 03-01-2018, 11:06 PM   #9
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Dale walker sells one and Hindle had a blow out sale recently , Black Widow also makes one. I have a new Black Widow never used I would make a deal on .
I know Dale lists them, I don't know if he actually has them available though.
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Old 03-17-2018, 04:53 PM   #10
Chik'Tikka
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Quote:
Originally Posted by Ivan View Post
Do the MB kit (MB stands for modified box)

Port the intake boots to take full advantage of the airbox mod, it works great with the stock header and slip-on.

I need to update my web page for more clarity on application... For the record, kit application goes by intake restriction.


Ivan
Oh, okay. That makes a lot of sense. I wasn't sure if there was some drastic difference between stock pipes and common aftermarket ones that needed two kits.

Thank you very much for the clarification+^_^+

Regards; Chik'Tikka
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Old 09-09-2018, 09:12 PM   #11
NMWBT
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Quote:
Originally Posted by Ivan View Post
Do the MB kit (MB stands for modified box)

Port the intake boots to take full advantage of the airbox mod, it works great with the stock header and slip-on.

I need to update my web page for more clarity on application... For the record, kit application goes by intake restriction.


Ivan

I want to do the airbox mod and jets in my 03. For whatever reason the previous owner knocked a baseball size hole in the back of the airbox, assuming to create more airflow. Would this suffice as a beneficial mod or do I need to fix it and do your mod?

Also, I would need the MB kit right? I have the Danmoto slip on and paper filter. I will upgrade to a K&N if I need to for the kit.

This is my first bike and am loving it but just want a little more!😉
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Old 09-10-2018, 02:53 AM   #12
Ivan
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You would need to get another lid and start over.

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Old 09-10-2018, 03:38 AM   #13
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Yeah I thought so. Are there any gains in going to a better filter?
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Old 09-10-2018, 03:40 AM   #14
Ivan
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The kit requires a K&N or BMC filter.
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Old 09-11-2018, 11:47 AM   #15
NMWBT
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The kit requires a K&N or BMC filter.
What if I did the pods instead?
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Old 09-11-2018, 11:50 AM   #16
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The previous owner busted a hole in the filter box itself so I will have to replace the entire airbox. I figured I could do pods for about the same as the box with a K&N. Any advantage or disadvantage to going with the pod kit?
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Old 09-12-2018, 04:58 AM   #17
Ivan
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Charts that compare pods to MB kit here:

http://www.ivansperformanceproducts.com/fz1dyno2.htm

There's no difference in driveability between the 2 kits.

Pods make more noise and require a little more maintenance.


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Old 09-13-2018, 10:07 PM   #18
NMWBT
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Quote:
Originally Posted by Ivan View Post
Charts that compare pods to MB kit here:

http://www.ivansperformanceproducts.com/fz1dyno2.htm

There's no difference in driveability between the 2 kits.

Pods make more noise and require a little more maintenance.


Ivan
Perfect! Thanks!

One last question...well maybe!😉
Where can I find the exacts on the airbox mod (including pix)?
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Old 09-14-2018, 11:16 AM   #19
Quisp
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Originally Posted by NMWBT View Post
Perfect! Thanks!

One last question...well maybe!😉
Where can I find the exacts on the airbox mod (including pix)?
http://www.yamahafz1oa.com/forum/sho...ns+air+box+mod
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Old 09-14-2018, 11:38 AM   #20
Ivan
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Post #16 is correct... the first photo is wrong.

The kit comes with a photo.

It's not necessary to trim the lip height.


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