Heated grips.

Maybe you should consider heated gloves. I've been using them for the past 2 years and if you don't mind the cabling they really are much better than heated grips. However, heated grips or heated gloves, either are better than cold fingers.

 

See my thread below about fitting hand-guards. I did 350 miles last weekend (Nottingham to Kent and back) and never once thought about turning the grips on. OK, it wasn't freezing then, but hand-guards keeping the chill off your knuckles will certainly help when it is.

 

Riding a Thunderbird as well, I have the Triumph heated grips. Seem ok to me
As others are saying I would go with heated clothes and a jacket.
Can be run off the bike or a battery. Also if you change bikes they can go with you.

 

Here's a link to the hand-guard thread mentioned above - http://www.thetriumphforum.co.uk/threads/hand-guards.7634/

 

"Forgot to add, pasher could you update us now that you have had the guards fitted for a week or two how they are working out for you?"

They're fine. Don't imagine I'll be removing them, even when next summer comes. Just to add to what I said above, 350 miles in two trips last weekend, in summer gloves (no padding) and bar heaters not once turned on. All for £14 off of Ebay (and a bit of mackling to make a couple of brackets).

 

I had knuckle bark busters off a moto-xer they have another advantage over here in Australia, rocks thrown up by trucks. don't hit your hands anymore !! Put them on my 1994 Trident, only needed a longer pin/bolt that goes through the pivot point on your lever's, possible they might go on a later bike if you upgrade renew as long as it's another naked...!