Triumphrat

roadpoet

Can you help? I've had trouble with a bit of pinking on my TR6R, I've changed the the carb for a new one - used recommended settings, decoked and skimmed the warped head, strobe set the timing (electronic ignition), and the bloody thing still pinks! It does it at more than 1/4 throttle and even if I give it a bit of a blip when parking up in the shed. I use a Castrol ocane booster and lead replacement. Plugs are whiteish. I've read a few threads and am still puzzled. What about the leads being the wrong way round in the electronic ignition?

It's got me stumped!

Woody1911a1

try retarding the timing . shaving the head increased the compression ratio which will make the problem worse unless you removed enough carbon to offset it .

__________________
If you love it , let it go . If it comes back to you , you've highsided ;-)

OzBloke

Couple of things in response:

1 - if the pickup leads on the electronic ignition were reversed (depends which make/model) the timing could be out by 20-25 deg, and you would have mega-trouble starting the engine.

2- if your plugs are pure white, you may be a little too lean. Not sure if you're running an Amal, but if you are, try taking the needle up one notch to make it slightly richer in the mid range. Ie if you've got the clip in the top notch, move it to the centre notch, raising the needle.

3- when you strobe the timing, are you doing it at 5000 rpm? This is where the electronic ignition systems reach maximum advance. If you're setting it with a strobe below 5000 (eg 2000 -3000 rpm), it will be too advanced at lower revs.

4- set your timing with the engine at normal operating temperature. Take it for a 5-10Km run, bring it back home, then do your timing.

hope this helps

__________________
Per Ardua Ad Astra
(Through difficulties to the stars)

Red1959

My last two Sportsters bought new in 92 and 2001 both pinked! My old 59 Trumpet does not. I lowered the compression and retarded the spark a couple degrees. I did this with a 67 and a 69 with success. Starts easy, with no kickback. It probably aint as fast as it could be, but its fast enough to scare me! Watch for a lean mixture and be glad you have a single carb!

__________________
Martin Cvitkovich: www.thesplitbook.com

roadpoet

Thanks for the advice, I'll give it another go in the next few days and let you know if it makes any difference.

peintremondain

hi,
i had the same problem with a tr6 ! i had an amal with the factory settings...
i tried lowering comp ,retarding advance...nothing did !!until i changed the throttle slide for a 3.0(factory is 3.5) no pinking anymore!!!
considering your plug is whitish you're too lean
benoit

__________________
when i ride i\'m always 17