Torque Wrench

[ModChiP]

hello!
i want a Torque Wrench to work on my brakes and my Variator, and possibly on my spark plug.
i seen a TEKTON Torque Wrench.
https://www.amazon.com/dp/B00FMPKAD0?ref=emc_b_5_t
https://www.amazon.com/dp/B00C5ZL0RU?ref=emc_b_5_t

i can choice 3/8 or 1/2.

the brakes torque data is 35 n-m and 18 n-m.

the Variator torque data is 94 n-m and 54 n-m.

rear wheel is 120 n-m (this is the highest torque setting on the down town.

spark plug is 17.8 n-m.

what is the most recommend torque handle?

[CROSSBOLT]

Looks like you need both to get the range from spark plug (light) to wheel nut ( heavy ).

[ModChiP]

bote 1/2 and 3/8 start from 13.6 n-m.

[Tromper]

Yep both is best.
Not sure where you're at, but if you're in the U.S. you might want to check out Harbor Freight.
The wrench looked similar & was notably less expensive.
I have an HF 3/8.  If were turning pro I'd get a better one, but the HF one does fine for what I'm up to. 

bote 1/2 and 3/8 start from 13.6 n-m.

[ModChiP]

https://www.amazon.com/gp/product/B01LX4ND65/ref=ox_sc_act_title_1?smid=A1L7F5DL4H71TK&psc=1

https://www.amazon.com/gp/product/B01M1D17AW/ref=ox_sc_act_title_3?smid=A1L7F5DL4H71TK&psc=1

cover all the sizes.

[Stig / Major Tom]

Torque wrenches and our tiny spark plugs screwed into alloy engines......gives me the heeee bee geebeees..
I always use only the instructions on the NGK Iridium sparkplug box.
Finger tight until it makes snug contact ....then 1/2 turn more. Period.
Full stop.
"Drop the socket wrench and back away from the scooter!"

Stig

PS: This applies to new sparkplugs only. If it has had the crush washer mashed once already. I toss it and use a new plug. $7. Cheap insurance. Iridium plugs will never need to be removed for 50000 miles or so.

[ModChiP]

what about the Variator torque (94 n-m and 54 n-m)?
do anyone use Torque Wrench on the Variator?

[Tromper]

I use a Torque wrench on big stuff like variators, & other items, body and structure, but I'm with Stig on the sparkplugs.
Seems to work pretty good so far.

[mousejunks]

For your information, the variator nut is 19mm and the rear wheel nut is 25mm.

[ophelia]

Not either or. Definitely get two torque wrenches if you are concerned with setting the right torque. I have both 3/8" and 1/2" torque wrenches.

Even if a 1/2" drive torque wrench says it will do 13.6 Nm or 10 ft-lb at the lowest, good luck stopping at 10 ft-lb or even 30 ft-lb and not blowing straight through with the longer handle, stouter shaft and greater leverage the bigger wrench gives you. The clicking might not save you in time. You might destroy some smaller fasteners or studs and have a really bad weekend.

Big wrenches are definitely better suited for a higher range. I don't use my 1/2" torque wrench for anything under 60 ft-lb. I can't imagine using it with any accuracy below even if the tool manufacturer rates it as such. I'm not a ham-fisted person, but certainly it's far faster and easier to bring out my 3/8" torque wrench.

Same goes for regular wrenches. I use 1/4" for smaller fasteners. Takes just one error to make a routine job that much harder.

[hypophthalmus]

I have that 3/8" wrench. I use it more than any of the others. But I DEFINITELY don't trust it on the lowest end of the range. Absolutely do not tighten any spark plugs with it.

For under about 20 Nm, I use a 1/4", and that is suitable for spark plugs. But still keep the finger tight plus 1/2 turn rule in mind. My spark plugs click about 1/4 turn past.

Regardless of what I'm tightening, I'm paranoid and creep up on the torque values (but not so slow that it doesn't turn before clicking).

Do use a torque wrench for the variator. The wrenches are most accurate at the top end of their range I believe, so the 3/8 should be well suited for that.

[hypophthalmus]

Regarding never reusing spark plugs, I've never heard this suggested before. Certainly the manuals will tell you to check the gap occasionally.

And I think it's a good idea to look at them occasionally to get an idea of how the engine is running. Especially in a carbureted engine (Do EFI scooters offer fuel trim or o2 sensor data?).

[Tromper]

Depends on the plug really, & how hard to access.
On the SYM it's pretty easy to get to, & cheap so I tend to replace it when I pop it open.
For the burger, they're a PITA to get to, so I use fancy ones and don't check 'em real often.  Cuz I use fancy ones, that cost a fair bit more, & last really well (same plugs in my RAV4 go 120k according to Toyota) they were as new, so I just put 'em back in last time I had it open for a nightmar..er I mean Burgman valve check.