make a donation to the fz1oa
fz1oa chat
fz1oa picture uploader
maintain your own photo albums
locate fz1oa members
Members Assistance Guide
search the entire board
click here for fz1oa web site home page
register a new account, it's free!
fz1oa store
email the fz1oa webmasters
read the fz1oa guidelines
read the fz1oa policy
open pat's fz1 site in a new window
open iowaz fz1 site in a new window
technical tips

Go Back   FZ1OA Message Board > FZ1 & Fazer Owners Association > FZ1 Problems & Issues > Gen 1 Problems & Issues

Reply
 
Thread Tools Display Modes
Old 06-18-2017, 08:49 PM   #21
longeze
Registered User
 
Join Date: Sep 2015
Location: Wisconsin
Posts: 244
Quote:
Originally Posted by cccolin View Post
...in one specific condition, which is when i'm cruising at around 4k or 5k and punch it really hard. There's a weird flat spot until it gets to around 7-8k.
Quote:
Originally Posted by 5lv View Post
...check out the EXUP.
The exup being out of adjustment or working improperly is a VERY common problem for Gen 1 bikes and I would check that out before continuing to search for a fix. I should have listed that at the front of my list.

If your Exup is working properly then you might consider this: The rpm band you now describe is the area of transition off the needle to the main jet(5000 to 7500RPM give or take). Just to be clear, when I said that "putting in a jet kit is not the fix for the problem", I meant that the problem you have can be fixed without installing a jet kit. Needing your carb serviced or adjusting the mixture is not the same as buying a jet kit. Will your bike accelerate faster with one - yes. Do you need a jet kit to make your bike accelerate smoothly from any rpm to red line - no. The thing is, that guys like Dale and Ivan have figured out the typical mixture requirements to get better performance if you've made certain modifications such as adding a Yosh slip on.

With that said, the question becomes: Do you want to spend $130 bucks(more or less) to buy a known working solution(properly sized jets & needles for your state of tune), pull your carb rack, install the parts and so forth OR do you want to try adjusting your needles first to see if that won't correct your hesitation? It takes me about an hour to pull the tops off my carbs while on the bike and move the needle positions in the slides and replace the tops. If you go that route, pull gently on the diaphrams while holding them up to the light to look for pin holes. If you see any light through your diaphrams, replace them.

If you have to change the main jet, you'll have to pull the carbs anyway. Rather than repeat the tuning procedure, just search on it. It's been described many many times over in great detail on this and other sites. While you're at it, remove your air filter after you've run your bike. Is it wet in there? If it is, then you could be experiencing reversion, in which case you might try moving your needle clips up 1 slot to lean things out a bit more and try that. As always, please let everyone know what you find so your experience can be added to the borg collective ) Don't hesitate to ask for more information if you need it... Good luck!
longeze is offline   Reply With Quote
Old 06-22-2017, 10:42 PM   #22
cccolin
Registered User
 
Join Date: Nov 2013
Location: Brooklyn/South Carolina
Posts: 177
Quote:
Originally Posted by 5lv View Post
If this is your first gen1 Fz1 what you are experiencing could be normal. If you're used to something with more mid range it might feel flat until it gets to peak torque, which if memory serves is at 7400 rpm.

Also check out the EXUP.
no, as I said above, it's my second one but the other one was modded. Ivan everything and upgraded suspension. but I had a ZRX for a couple years between that one and this one, also a Superhawk.
cccolin is offline   Reply With Quote
Old 06-22-2017, 10:46 PM   #23
cccolin
Registered User
 
Join Date: Nov 2013
Location: Brooklyn/South Carolina
Posts: 177
Quote:
Originally Posted by longeze View Post
The exup being out of adjustment or working improperly is a VERY common problem for Gen 1 bikes and I would check that out before continuing to search for a fix. I should have listed that at the front of my list.

If your Exup is working properly then you might consider this: The rpm band you now describe is the area of transition off the needle to the main jet(5000 to 7500RPM give or take). Just to be clear, when I said that "putting in a jet kit is not the fix for the problem", I meant that the problem you have can be fixed without installing a jet kit. Needing your carb serviced or adjusting the mixture is not the same as buying a jet kit. Will your bike accelerate faster with one - yes. Do you need a jet kit to make your bike accelerate smoothly from any rpm to red line - no. The thing is, that guys like Dale and Ivan have figured out the typical mixture requirements to get better performance if you've made certain modifications such as adding a Yosh slip on.

With that said, the question becomes: Do you want to spend $130 bucks(more or less) to buy a known working solution(properly sized jets & needles for your state of tune), pull your carb rack, install the parts and so forth OR do you want to try adjusting your needles first to see if that won't correct your hesitation? It takes me about an hour to pull the tops off my carbs while on the bike and move the needle positions in the slides and replace the tops. If you go that route, pull gently on the diaphrams while holding them up to the light to look for pin holes. If you see any light through your diaphrams, replace them.

If you have to change the main jet, you'll have to pull the carbs anyway. Rather than repeat the tuning procedure, just search on it. It's been described many many times over in great detail on this and other sites. While you're at it, remove your air filter after you've run your bike. Is it wet in there? If it is, then you could be experiencing reversion, in which case you might try moving your needle clips up 1 slot to lean things out a bit more and try that. As always, please let everyone know what you find so your experience can be added to the borg collective ) Don't hesitate to ask for more information if you need it... Good luck!

thanks. it's been doing it sort of randomly so I'm thinking it may in fact be some sort of clog in the jet. or maybe the exup. who knows. I'll look into those things and report back.
cccolin is offline   Reply With Quote
Reply

Go Back   FZ1OA Message Board > FZ1 & Fazer Owners Association > FZ1 Problems & Issues > Gen 1 Problems & Issues


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -7. The time now is 03:35 AM.


Questions? Comments?
Click on name below to contact via PM
Rabeet (Admin) Desmo (Admin)

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Website and Message Board Contents Copyright 2001-2007 FZ1OA
The marks YAMAHA® and FZ1® are used under license from Yamaha Motor Corporation, U.S.A.
The information on this web site is NOT approved or endorsed by Yamaha Motor Corporation in any way.
Page generated in 0.13559 seconds with 11 queries