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Jan 27th 2017, 06:56 PM   #1
 regunner's Avatar
 
  Jan 2017
  Hillsboro

  Yamaha FZR1000
Yamaha FZR1000 Jetting advice needed?

I picked up a survivor '92 Yamaha FZR1000 with just 4,500 miles last October. Cleaned the carbs with new gaskets and float needles. Stock jets, air box, filter.
Starts and runs great to 5-6K but doesn't continue to make power in the upper revs? Has aftermarket Vance Hines SS2 exhaust and EXUP has been inspected, lubed and seems fine. I'm thinking a jet kit and adjustable needles are needed? Any previous "experience" or advise would be appreciated.
Jan 28th 2017, 07:09 AM   #2
 Motorbiker's Avatar
 
  Jan 2016
  Silverdale, WA

  1987 FZR 1000
Always check the basics first. Air, fuel, and spark. My 87 (owned since new) started losing power and would occasionally spit, sputter and backfire at greater than 4000. It turned out to be the ignition timing sensor. By the way, the bike had right at 100,000 miles on it then. Also if you do ANYTHING in the way of carb kits, check out Factory Pro. Their kits WORK!
Jan 28th 2017, 04:19 PM   #3
 regunner's Avatar
 
  Jan 2017
  Hillsboro

  Yamaha FZR1000
thanks for the advise. Took it out today to run some gas through it then fill again with Chevron Plus... Ran great and never needed or tried to rev past 6,500 rpm's. I'll snag a factory pro stage 1-3 kit and go from there?
Jan 29th 2017, 11:05 AM   #4
 Motorbiker's Avatar
 
  Jan 2016
  Silverdale, WA

  1987 FZR 1000
In as built status, these bikes were pretty well sorted out in the carb area. If carbs were disassembled and cleaned then your problem is likely elsewhere. Unless...your needles and needle jets are so worn that you are running super rich in the midrange. But WOT should clean out and run better. Don't throw money down the drain. The Factory Pro 1.0 kit should work well if you decide to put a kit in it. Also, just to mention it. Be sure to use good spark plugs. NGK, or Denso would be fine. Be sure your basics are good first!

Edited by Motorbiker on Jan 29th 2017 at 11:18 AM
Jan 29th 2017, 11:23 AM   #5
 Motorbiker's Avatar
 
  Jan 2016
  Silverdale, WA

  1987 FZR 1000
Oh yeah, congrats on finding a really clean FZR. I still make some riders take notice. Keep the shiny side up.
Jan 29th 2017, 11:49 AM   #6
 dragracer1951's Avatar
Moderator
 
  Jan 2016
  Bremerton

  07 XB12 Buell Lightning
have a look at the emulsion tubes
Look for egg shaped holes.
Put a needle in the hole and look through it. You'll immediately see if it's worn or not
Jan 31st 2017, 09:52 PM   #7
 curve addict's Avatar
 
  Apr 2016
  Auburn, WA

  ...1987 Yamaha FZR1000...
My FZR is an '87 model. That said, here's what I found one day in the high desert of Arizona.

Was doing a few things on the bike, with the fuel tank off, and decided to remove the snorkel from the air box. The rest of the engine, including the exhaust, was stock. The engine ran great, everywhere except wide open at revs above ~6500rpm. The power just fell off and wouldn't come back on until the throttle was closed some or the revs were brought below ~6000rpm.

I thought that the fuel pump was getting weak, wrong. Fuel filter issues? Nope...

After a frustrating day or two, I decided to reinstall the snorkel. The power came back; silky smooth everywhere. I was planning on re-jetting the mains on the carbs to compensate and remove the snorkel again for kicks. I haven't gotten around to it yet. The bike runs great totally stock. Eh, maybe some day I'll play with the tuning again.

Good luck to you.
Feb 26th 2017, 08:28 AM   #8
 regunner's Avatar
 
  Jan 2017
  Hillsboro

  Yamaha FZR1000
FZR1000 seems to be fine...?

After a few tanks of gas with some added techron cleaner it seems to be fine. I must admit it is not easy to test since it has so much power without even getting it past 6500 rpm's. I've never needed the upper revs for power with my other litre bikes being a RF900R and 1200 Bandit that felt identical engine wise.
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