23055A002 Class Z Individual Plug Gauge, .1055" Size, Go Gauge
23055A002 Class Z Individual Plug Gauge, .1065" Size, Go Gauge
These cost US $3.10 each in July, 2013. However, by the time the gov't. got a bit of tax and the shipper got paid, the total came to $15.68
Being .0005 under and .0005 over, these probably are not quite as close in range as JH recommended. The .1065 was loose in my old main jet, but was no-go in the new one from Burlen. The .1055 was a nice slip-fit in the new Burlen jet. My mileage went from about 36mpg to about 55+ mpg. The black soot went away from my plugs. Although it didn't seem too bad before, the bike ran better immediatley, with a noticeable difference.
'64 TR6R Plus some Twins from other countries (U.S., Germany, Japan)
So, here I sit with my new go/no go pin gauges and my new .105 jets and needles. Needles are all 2.670" long as measured with my third hand, old digital caliper. Jets are .801"long. My .1048 go gauge slides easily into all four as does my .10509 no go, but I do feel it hanging up a bit. I've paired up the jets as to "feel" My concern is that none of the jets have the chamfer at the hole on the threaded end. Better none have the chamfer than some???? Jets came in a sealed AMAL package. Now to put them in to the jet holder, when it cools down a bit in the garage, and measure again. No more mindlessly throwing things together. Did a rough mileage check on the 72, no working speedo on either bike, and came up with 41/42 MPG. Sounds about right, the 68 gets less. Can't wait to try another check with new parts. My mistake. With glasses and a magnifying glass I can detect a slight chamfer at the hole. So all is well..
Last edited by desco; 09/15/148:56 pm.
1968 T120R 1972 T120RV Any advice given is without a warranty expressed or implied.
Re: Pin gauges for needle jets.
#563459 09/16/141:43 am09/16/141:43 am
I have Dyno proof showing there is no difference in stoic and power if you do not have a chamfered hole in your jets. Don't let anyone sway you otherwise. Theory and real life are not the same on this issue. (I've see more than one heated argument on this one)
The formula for how many motorcycles to own is: n+1=y n = the number of motorcycles you currently own.
Re: Pin gauges for needle jets.
#563485 09/16/149:10 am09/16/149:10 am
Vermont Gage makes the required gages for measuring the jets in plus/minus sizes in nominal inch jet sizes ie. .105", .106, .107, etc. No need to settle for .1055", .1065", etc sizes.
Travers Tools, although not listed on their web page, will get plus/minus nominal size .105", .106", etc from Vermont Gage.
The part number for a .106" minus is 58-101-060. For a plus it would be 58-201-060. A .107 minus would be 58-101-070. For a plus it would be 58-201-070. I am afraid the shipping would probably be as much as the gages. Or you can order them through one of our dealers.
You will need a plus and a minus plug gage. Example minus .1058" - plus .1062" to check a .106" jet.
A .1065" gage is too big to check a .106" jet, especially if it is a plus. That isn't to say that it wouldn't be handy if you choose to ream out a .106" jet to .1065".
ZZ class plug gages will do the job nicely. No need to get Class X gages with their minus .00000" - plus .00004" accuracy.