Quote from: MarioR on April 02, 2026, 03:01:40 PM

Quote from: 5speed on April 02, 2026, 09:29:17 AM86 fj1200..stock engine.
I added black widow pipes and these mufflers due to their claim I wouldn't need to rejet my carbs.
https://delkevic.com/yamaha-fj1100-fj1200-1tx-84-88-slip-on-13-5-x-oval-stainless-exhaust-muffler-kit/
well..when I let up on the gas it back fires out the exhaust..
so my questions are..does anyone else run these mufflers and did you have to reject the carbs?
I plan on removing the baffles because it sounds like a Ducati now..or a 2 cylinder john deer tractor. lol
OH..if you order pipes from  Black Widow you're possibly going to have to mod the end that goes in the engine. They make it to long and you can't put the chin spoiler on unless you shorten the pipe.
I e-mailed them regarding this and they claim their pipes are correct. lol ya..ok.

http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

Thanks.

I'm trying to get animals sorted out and Jeff & I will be there 12th to 19th or 20th....then on up to Lexington VA to work a horse show before driving back home on the 24th/25th.

NancyK

If you were closer I'd buy it today.

As it is, I'll sleep on it.

I do like a good road trip!

glws

The fat end of the taper spindle definitely goes to the bottom like in the picture shown on the bench in the post. I had a set of forks where some one installed the skinny end down and when they torqued down the damper rod bolts the taper spindles were wedged into the fork bottoms.I was never able to remove the taper spindles and had to buy another set of forks for the fork bottoms. Surprisingly the forks worked ok with the taper spindles in upside down but that may have been because they had been converted to gold valves and the damper rods had been drilled out.
   The oil seals have to be installed with the springs down torwards the oil.

There is a conversion chart online for dynojet to similar Mikuni/Keihin sizes, start there.

I've been doing my own fork rebuild on my 84 1100 and I've been running into issues with my Clymer shop manual. It has the "Flower pot" (36Y-23173-00-00) And Oil Seal (3SP-23145-L0-00) both ways around in the darned thing. I've also consulted this page; https://fjowners.com/index.php?topic=1911.0 But I'd like to double check everything before committing to re-assembly. "Flower pot's" Flared end to the bottom. And the oil seal's open side (Where you can see the wire spring) to the top, right?

Quote from: Waiex191 on April 05, 2026, 02:38:19 PMDoes anyone have a writeup on removing and rebuilding the ignition switch?

As best as I can tell, there are two bolts underneath to remove, and unplug the connector.  I think I've got to pull the tank to get to the connector.  I may be able to get the bolts without removing the fairing and cluster, but if anybody can confirm or deny this I'd appreciate it.  Possibly by going in from underneath the fairing with a long extension.

When we re-jet our carbs for intake and exhaust mods, we discuss changes to the pilot, the main, and the needle height. But I don't usually see any recommendations to change the stock #155 air jets.

I have a new project bike, a 1992 FJ1200 with 4 into 1 Vance & Hines pipes and pods. I bought it not running. The PO had 37.5 stock pilots, 118 mains, and 144 air jets.

I'm was planning to put in 42.5 pilots and sticking with the 118 mains for starters. Then I realized the air jets weren't stock. How will the 144 air jets affect this setup?

Is changing the stock air jets from 155 to 144 similar to changing the pilot jets from 37.5 to 42.5?

Nice! How much lower are these than the stockers?

Quote from: RPM - Robert on April 04, 2026, 01:40:06 PMPost a picture of a slide and the main jet needle.

I don't think I have any pictures.  The carbs are in the bike and the bike is on the road.