Triumphrat

coelacanth · 12-15-2007, 07:28 PM

I thought I was doing it carefully enough, but obviously I was wrong.

I ended up cross threading outside rear bottom of the left carb. (the one that idle knob is mounted to.)

Am I truly in the world of sorry? Can I re-tap the thread without taking the carbs apart? I've never done this in my life and a bit freaking out.

Could somebody point me out how I should solve this?? I can still go hardware store / or my dealer, but willing to do the fix myself.

Thanks for your help!!

F4sSprintST · 12-15-2007, 07:41 PM

Back it out,

take a look at the damage, you can probably retap it and be okay

if it just holds something, maybe you could tap it one size larger

worst case? fill the hole with JBWeld, drill and retap

bonnevillebilly · 12-15-2007, 07:44 PM

Yes you can run a tap through and get a screw to match.
Take one of the screws out and size it to the next closest size bigger.
a #8 or #10 screw should be close.
just use a little oil on the tap when you are tapping the new threads.
You may be able to retap the same metric thread also if you can find the
right tap I'm not sure of the size in mm.
good luck
Bill

CAPTDON · 12-15-2007, 07:50 PM

As said re tap it & be CAREFUL next time! These cheap pot metal parts will go south on ya very easy!! Gotta make sure its going in & out freely before going @ it!! I still have nightmares about the old honda "philips" screws/ bolts that held the engine together!!
Used t ohave to buy a $12 impact driver to use the stock ones. The allen set was more than thedriver!

coelacanth · 12-15-2007, 08:00 PM

hey guys. Thanks for quick responses. I'm on my way to a hardware store.

I always use my fingers to screw things in to avoid this kind of mess, but I was stupid enough and didnt notice any resistance on my fingers at all.

I need to perform retapping with handtools only in a small parking spot. Do u thinks it's easy enough?

dazco · 12-15-2007, 08:10 PM

Another possibility if you are carefull is to find a self tapping screw, possibly a SAE instead of metric because 1)-easier to find in a hardware store, and 2)-because that way it's easier to find a size just barely larger. It's doable as long as you are mechanically inclined enough to read between the lines.

bonnevillebilly · 12-15-2007, 08:14 PM

You will probably have to use a very small opened end wrench on the tap
because there may not be enough room for a tap handle.
Just take it slow thread it in a little at at a time and then back it out
then thread it in a little more each time til you get through and don't
forget to use some oil on the tap.
You should have no problems except for having very little room to work.
In which case you could always remove the cards.
Bill

Baltobonneville · 12-15-2007, 11:53 PM

I'd first try using the same size metric tap, with some light oil, very gently, to clear the threads.

Then, use a screw that is at least 16mm long (check me on the length before you go out and buy it). This is barely enough to utilize all the threads in the hole; you probably only damaged some of the threads. The NB kit has shorter screws, and I've suggested to Brent that he replace the ones that attach the choke bracket with 16mm screws.

I don't think there's enough clearance in this corner to put in a long screw and a split-ring lock washer and nut, but if there is, that's a possibility, not elegant, but it would work.

sweatmachine · 12-15-2007, 11:55 PM

there's a set of used stock carbs in the classifieds...

coelacanth · 12-16-2007, 12:01 AM

Hey guys. Thanks again for your help. I really really appreciate it.

Most likely I'm going to be using small wrench to tap because of the limited space.

I'll do the job tomorrow and report back the result. Hope to death it's gonna be a good one...

Baltobonneville,

Yes I did use same size metric tap and cleared the thread. (This was also recommended by the guy at hardware store. He thought I might get away with it and use same size screw)

I still need to get a tad larger tap tomorrow morning and retap the thread. I'm going to get 16 mm screws for this messed up thread and also the one behind it. I already got a 16 mm bolt (stock diameter) to test out. It seems 16 mm with split-ring washer should work.

dazco,

I'll probably get a tap and then use regular screw, but using SAE tap and screw instead of metric makes sense because I can find a size a tiny bit larger than stock screw. Are there any downside or danger to doing this other than remembering which screw fits this particular location in future carb works? (damaging the hole or something?)

The one I originally had was hex head screws that I got from NB.com, which I believe 0.75 thread pitch 4mm diameter. I'm still wondering what size, and which standard (SAE or metric) would be the best and safest way to take.

I saw that stock carbs in classified section but I really hope I don't have to end up getting that...