The guy we bought the bike from said it had a missfire. He changed the plugs and drove it for a day and it was fine. My husband drove it for a day and it was also fine. Yesterday it started having an intermittent missfire, where he would lose a cylinder and it would shut off on him. He'd let it sit a minute and it would fire right up and drive fine again. This has happened 3 times now. Since we are new to bikes I thought maybe you guys would know a common problem? Should we start with replacing the coil pack?

 

Can you swap the coil with the other bike?

 

Are they the same? the 93 and 96 coils? Good idea

 

Check the voltage regulator/rectifier as well. It can cause power issues if it is failing.

Here's a couple of links for complete diagnostics, visually check the connector/s and
the r/r itself for signs of heat damage. i.e. melting/warped plastic cracked/splits in
the epoxy seal on the r/r itself or burnt pins on the connectors.

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

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

Ern

 

Ok. I'll let him know

 

Well he took the plugs and coils from my bike, because my bike runs fine, and swapped them over. He took it for a ride and didn't get very far when he said he lost a cylinder, sounded like it was going to recover, and then just died.

 

then thats not it. i think there is a spark control module that controls the coils. maybe swap that too. also give the r/r a try as well.

must be nice having a bike full of good parts to test with.

 

I can tell you from first hand experience, it is... lol


TechGirl1414, what part of FL are you in ?

 

oh, i know. i have another 929 that i rob parts from as i need to. shouldn't everyone have a spare bike? hahaha

 

Yes, it is. I was pretty sure though that if the plugs and coil fixed the problem that I would not be getting them back though LOL.

So anyway, he went back out and took my rectifier to swap out. He said as soon as he plugged it in he heard a pop, from a fuse possibly. I guess it wouldn't start and that's when he came back inside. I am sure he will be messing with it before work this morning too.

I am in Sarasota County, between Tampa and Fort Myers. West coast.