Triumphrat

Triumphforever · 11-11-2012, 05:42 PM

I broke a throttle cable about a month ago on my D12. I replaced the cable and then I couldn't get the bike to run. I found out it was a problem with the petcock, replaced that, (should have bought a Pingle)and problem solved. The other day the wife and I took the D12 and her Str3 out for a Sunday drive. We hadn't gone far, and my bike started to miss bad under throttle, and wouldn't rev past 5 grand. When we stopped at the end of the road it snapped out of it and worked fine for the rest of the ride. Then the next day we went out, and after about 15 miles it started to act up again. I thought it was a fuel problem again, so when we got home I loosend the tank and raised it up to make sure all the hoses weren't kinked and and still the same. So I unhooked one coil and it still ran the same(on two cylinders), hooked it back up and unhooked the other coil, the bike quit.
I ordered a set of Nology coils from Fast Eddies, recieved them and installed them today. The bike started right up and ran fine till it warmed up then it quit. I checked the hoses and one was kinked. Fixed that, got the bike going, and went for a test run down the road. stopped at the end of the road, the bike quit,put the petcock on prime, choked it and it started right up. I put the petcock back on run and come onto er. The bike worked fine but I had to turn the black nob on the carbs in to increase the idle, let her idle for about five minutes and the bike worked fine. Is it normal to have to increase the idle after new coils or was it just because it was so cold out( 36 f and spitting snow)?

Sorry for the long post
Chris

bradtx · 11-11-2012, 06:15 PM

Chris, I did on one very cold day have to run my Z1 with the choke partially closed or it wouldn't idle at all. The carbs were properly jetted and adjusted per reading the spark plugs, it just wasn't quite coming up to operating temperature was my guess.

Brad

Turk955i · 11-11-2012, 06:27 PM

When you replaced the petcock was it because it was all gummed up ? Did you clean the carbs back when you replaced the cable and petcock ? Maybe there's some sediment that's clogged a pilot jet ? It start's right up when you apply the choke? Did you have to turn the idle adjuster all the way up to get it to idle? Sorry for the 100 ?

Triumphforever · 11-11-2012, 06:32 PM

Brad... When I took her out for a test run I didn"t have the seat on or the seat cowls, so it was sucking cold air in through the breather box tubes. It"s supposed to warm up to around 50 tommorow, so we are going to go for a rip. I'll put the seat on and the cowls and see if that makes a difference. It did come up to temp on the guage, but it must have been from sucking the cold air in the tubes.
Thanks Chris

Triumphforever · 11-11-2012, 06:38 PM

Turk... No I didn't clean the carbs when I changed the cable, and I didn't have to turn the idle all the way in, just a bit, maybe four turns. The bike seems to run fine, just had to increase the idle. It must have been the cold air
Chris

alloymotor · 11-12-2012, 11:47 AM

I would suggest checking to see if fuel tank is venting properly,vapor lock can cause your stated symtoms

Triumphforever · 11-12-2012, 11:55 AM

I think I got her sorted out now. The vacuum petcock is a royal pain in the ass. I wish I would of bought a Pingle tap. We're going out for a rip after lunch, so cross my fingers I hope everything works good.
Chris

Triumphforever · 11-12-2012, 05:05 PM

The D12 is finally working good, had her out for a good rip after lunch. I had a small issue with the dreaded vacuum petcock ( the vacuum hose came off). It ran good on prime so I knew it was the vacuum hose. I went back home and took the tank off again and sure enough the hose was off. I know I can take the tank off now with a blindfold on lol.
Now I have another puzzle to figure out. The tack would not respond to an increase in throttle. When I cranked on the throttle the tack would not come up over 3 grand, and then when it did it would go up to 7 and zoom back to 5, or 4. I thought maybe the clutch might be slipping but I could not hear the engine rev up. I took her back out and it seem to work fine, I only had it flutter once, Between 90 and 100 mph.
Does anybody have an idea what might be causing the tack to work so wonky

Chris

Turk955i · 11-12-2012, 06:05 PM

My Legend TT did kind of the same thing today, at a steady speed the tach was bouncing from 4k up to 5k and then back down to 4k, but it only lasted for about 3 - 4 miles then it seemed to straighten out. Maybe it's been happening for a while now and I just never noticed it because it's not my regular ride. I asked my girlfriend(it used to be her's ) if she ever noticed it and she said she hadn't. Definately not a slipping clutch though

Triumphforever · 11-12-2012, 06:37 PM

Turk.... strange behavior for sure, mine never did this before. When it happened I thought, oh no not something else. With all the problems I've had lately I guess the old saying holds true, it never rains but it pours!
Anybody else have this problem before, or an idea what it might be. Any help would be appreciated.
Chris