Author Topic: Triumph 750 twin gearbox drain plug  (Read 1219 times)

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Offline jimson

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Triumph 750 twin gearbox drain plug
« on: May 04, 2016, 02:53:46 PM »
G'day viewers & yes I know your thinking it's not VMX but I'm sure there's a few engines in dirt bikes over the years. Anyways I have this engine a triumph T140 1976/77 model & I'm trying to locate the gearbox drain plug. It's not ware the repair manual says it is. Right hand side kick starter side it does not have a drain plug for the gearbox. So any information would be appreciated. Jimson
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Offline LWC82PE

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Re: Triumph 750 twin gearbox drain plug
« Reply #1 on: May 04, 2016, 05:25:20 PM »
Take another look. It is directly facing the ground at the bottom of gear box case floor. Near it you will also see a taller hex, thats detent plunger for the cam plate, don't unscrew that one. You will need to get on your hands and knees and possibly use a torch if the motor is in the frame as its buried up underneath and bit hard to see.
« Last Edit: May 04, 2016, 05:27:30 PM by LWC82PE »
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline jimson

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Re: Triumph 750 twin gearbox drain plug
« Reply #2 on: May 04, 2016, 07:27:07 PM »

This is the picture in my repair manual but my casing does not have the bottom sump plug like the picture has ? Jimson
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Offline LWC82PE

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Re: Triumph 750 twin gearbox drain plug
« Reply #3 on: May 04, 2016, 07:38:51 PM »
That drawing is very mis-leading. Plug D/C are no where near there. That plug is directly under the motor in the middle sort of. When you drain it it comes out near the center stand. I normally put a container between the center stand feet. You need to poke your head right up under the bike to see it. You will need a socket on long extension too.
« Last Edit: May 04, 2016, 07:41:53 PM by LWC82PE »
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline jimson

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Re: Triumph 750 twin gearbox drain plug
« Reply #4 on: May 04, 2016, 08:17:41 PM »
Thanks for your help LWC, I will have a look when I return home & see. I've been laying down with a torch & couldn't see the bloody thing. Jimson
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Offline jimson

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Re: Triumph 750 twin gearbox drain plug
« Reply #5 on: May 07, 2016, 07:58:03 PM »
Thanks LWC I found it & your right the picture is very deceiving, thanks for your help. I'm just that much closer to the blue slip. Jimson
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