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#880829 05/17/22 11:34 am
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S
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S
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Would someone quote me ignition timing and tappet clearances for the Triumph TRW sidevalve twin, please?
It's 1952, very original with less than 1600 miles on the clock. While I normally like a bike with some spark to it, this friendly war machine has won me over. It's in for a tune up and an oil seal change.

SR

TRW1.jpeg
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Hello SR,
sent you the Tech manual on your email,
Mick.

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Got it! Thanks MIck!

SR

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Hi fellas,
Just to satisfy the curiosity of others (well me really) would one of you post a scan of the technical details page?
Many thanks Dave

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Hello Dave,
PM me your email and I’ll send you the whole thing!
Mick

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Congratulations on getting that nice TRW.

You will find that it can run on some really bad gasoline. It was made to do so.

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Hi Stein, Is that your bike or customers? I've never seen one in real life. They look super cool. I don't care it doesn't have much power. I'd just like to ride around the back roads & the like. When I was a kid Honda 50 3 speed was enough. Still is for me.

I used to work on lots of Harley 45 flat heads. My favorite was the KH & KHK. The motor that got overhead valves & became the sportster. Those could go on freeways no problem. KHK was 900cc. Race version 45 (750cc) was the motor Triumph had to beat with the 500 twin.

I always liked the shape of the TRW motor. Flat heads just look neat & clean.
Don


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Burton bike bits has TRW parts and the handbook

https://burtonbikebits.net/trwmanual.pdf

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Originally Posted by Irish Swede
Congratulations on getting that nice TRW.

You will find that it can run on some really bad gasoline. It was made to do so.
Not mine Irish, more on that below.Thankfully, we don't have any bad gasoline here, but I believe you. 6:1 compression isn't much. Interesting carb too, I wonder if it's from a small British car or if it was developed for this bike? With the low mileage and mothballed condition, it's like a time travel machine, and I intend to take lots of photos for future reference. The last person to really work on it was a Meriden employee, 70 years ago. Uncanny.
Originally Posted by TR7RVMan
Hi Stein, Is that your bike or customers? I've never seen one in real life. They look super cool. I don't care it doesn't have much power. I'd just like to ride around the back roads & the like. When I was a kid Honda 50 3 speed was enough. Still is for me.

I used to work on lots of Harley 45 flat heads. My favorite was the KH & KHK. The motor that got overhead valves & became the sportster. Those could go on freeways no problem. KHK was 900cc. Race version 45 (750cc) was the motor Triumph had to beat with the 500 twin.

I always liked the shape of the TRW motor. Flat heads just look neat & clean.
Don
As I said in the original post, it's in for some service, so no it's not mine. I don't run a shop as such, but I do take on some work now and then. Quite regularly to be frank, but as a retiree I try to limit it to things I enjoy. Although I'm about to overhaul a T140 rear disc brake and master cylinder, which is my least favorite job!
The TRW has a charm of its own, great power isn't part of it. The way it can plod along at walking pace is uncanny and really useful in the small town I live in. It does have a nice throttle response, but runs out of steam at 50 mph. For what it is, that's about as fast as I'd like to go anyway, but I feel so relaxed doing it, With such a low center of gravity it feels a bit like a pushbike, and the rigid frame adds to that feeling. It's small though, and at just under 6' tall I don't fit well on it, the seat to far forward and my knees sticks out forward of the grips. The gear ratios are very strange, with three low ratios and a tall top, it can plod along at walking pace along the troops all day and then pick up as clean as anything when you need to hurry silently back to the HQ. Yes it's fun.

SR

Last edited by Stein Roger; 05/18/22 6:57 am.

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