Ok sooooo I JUST got finished cleaning out the carbs 3 times not but a month or two ago after a couple months down time cause I was being lazy. But got the bike running again perfectly. Or so u thought....

Rode it to the park like maybe a mile or two down the road in 50 degree weather and sunny and parked it, came back to it and ride home 45 mins later. When I got back on and rode. I noticed my tach was no longer working and I couldn't ride more than roughly 6000-7000rpms in first with out the bike powering on and off the throttle on its own like a newb on a bike with a touchy throttle and doesn't know how to use it. And if I try and go to 2nd well u can just forget that it will do the same throttle thing at any RPM.


Any ideas?!

 

Did you disconnect the connector on the ECU? Is it plugged in all the way? I would check any wiring you disconnected. I would look at the connectors on the coils to make sure they are not loose also.

 

Yea most definitely, ill check that first off and let you know. I didnt really have to unplug much which is the weird part, but yea ill check connections.

 

Had the same problem for the first week with my bike lose all power or super jumpy. The kickstand switch had shorted out making the bike kick and jerk anytime it hit a bump. Bypassed the switch with a jumper to test it. Green to Green/white.

 

Alright ill check that its warmed up here in Texas now so I can look at it cause I don't have a garage I can work in

 

i was able to check connections, and the kick stand and everything is secure and seems to be working properly, but a lot of ppl with my same issue seemed to have thought it was the Speed Sensor, so i think thats going to be my next step :/

thoughts?

 

I am not sure how the speed sensor could cause this problem. Maybe someone smarter than me can say how?

FWIW, I cut the speed sensor out of my race F3 completely. Nada.

 

Double check the throttle position senser, on the left of the carb-bodys.
That lets the ICU know where the throttle is.

Never hurts to go through all of the connectors...
Cleaning, assuring connections and packing them with di-electric grease.
Keep an eye out for pinched, damaged wires.

With that out of the way, you can then start exploring other possibilitys,
but first, assure the health of the basic harness.

The tach issue may or may not be related to the stumble.
My 98F3 tach just gave it up at 19k.
I went to F4i guages, with no problem.

While it is possible the carb work you did is the root of your issue,
it might be some other component. Sometimes a bad r/r will exhibit
a lot of similar symptoms.
That's why I recommend a complete harness inspection first.

Here's a few great links to get a handle on the entire electrical/charging system...

Charging System Diagnostics - Rectifier/Regulator Upgrade - Triumph Forum: Triumph Rat Motorcycle Forums

https://cbrforum.com/forum/f2-tech-9...-solved-27739/

Technical Resources - Resources for Electrical Systems on Motorcycles and ATVs - ElectroSport

Hope this helps, Ern

 

MadHattr may have a point. The TPS has a very small plastic part that mates the TPS to the carbs. That part can come out and would render the TPS ineffective. Not sure but it is a thought.

 

ok yea i'm familiar with that connection so i will give that connection a double glance and if i see any imperfections i'll get a new cable first i'm sure that'd be cheaper :P

cause i did have to go at that plug pretty good to get it disconnected to take my carbs out. (not the plastic plug at the carbs but where it extends and plugs into the bike's harness on the side of the frame)