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1969 Trophy 250 restoration #787540 10/20/19 1:06 am
Joined: Sep 2019
Posts: 2
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Noah from PA Offline OP
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Last week my dad told me "get that other triumph out of the shed before the roof collapses." So I pushed it up the hill and here it is.

https://drive.google.com/file/d/1-34LVzfSkF-Y4QHzARxm4QMS6bFJNx8h/view?usp=drivesdk

This is my (dad's) tr25w and I am restoring it for him. He bought it at a yard sale in the 70's from a guy who thought it was a 2 stroke (yes I did just get 2 qts of blue oil from the various drains). To my knowledge or his memory that was the last time it was started. The odometer seems to be broken, it has spark without the battery, and that's about all I've looked at so far. I intend to test compression in the near future as it takes very little effort to kick.
So my questions for now are:
1) what wear/damage should I look out for considering the oil that was in it?
2) where is a good supply for parts for this particular machine?
3) what is the correct oil to use in this machine?
In addition to these things, what are some quirks that I should know about before I go ripping and tearing into this.

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Re: 1969 Trophy 250 restoration [Re: Noah from PA] #787543 10/20/19 1:49 am
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Al Eckstadt Offline
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Wow! Looks very complete and original, not speaking as an expert on the model. Your number 1) if you mean the gas/oil mix...If it had 2 stroke gas/oil in it, that won't damage anything. You would have to flush the fuel tank and carbs anyway. 2) Most parts you'll need are common to all Brit bikes and my personal favorite supplier is British Cycle Supply but any suppliers who advertise here are great. 3) I may regret to recommend an oil as that will start the dreaded oil thread, but I'd put 20W50 in the engine and straight 90W in the gearbox. A manual is needed to determine the primary chaincase oil but someone here will know.
And welcome to Brit Bike Forum!
Al


Al Eckstadt
Re: 1969 Trophy 250 restoration [Re: Al Eckstadt] #787545 10/20/19 2:25 am
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Noah from PA Offline OP
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Thanks al.it was my understanding that it was fed straight gas and 2 stroke oil in the oil tank. The manual I have recommends sae 40 in the summer but I was more concerned with type. I vaguely recall reading somewhere not to use oil higher than sn grade in old motors.
The bike is complete from what I can tell, with some aftermarket turn signals bolted on.

Re: 1969 Trophy 250 restoration [Re: Noah from PA] #787546 10/20/19 2:35 am
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tg4360 Offline
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You'll need to do some research to learn about the proper care and feeding of a BSA B25/Triumph TR25.

For instance, yes it's a four stroke and the fluids that should be in it are: Gasoline in the gas tank, fork oil in the forks, Oil in the oil tank, gear lube in the gearbox and some type of lube (some run ATF, some a monograde oil) in the primary chain case.

It's a dry sump motor and normally the oil over long storage will migrate from the tank to the sump of the motor. There's a plate there that you can remove to drain the sump. Make sure you do this before even thinking about trying to start it.

Get a manual and read it. Read it again and then a third time. There are various ones available. Check with the suppliers on the forum ads and do a little googling. Google "Rupert Ratio" for instance.

What I'm trying to gently point out to you is that is that a lot of your basic questions will be more than answered by doing these things and more importantly, the more you learn, the more you will be able to make decisions about what to do to and what to put in YOUR bike, because they are all different and we all have different needs for them.

We'll be here to give advice for the things that you don't understand or are confused about.... and there will be these things.


'68 B25 Starfire (single)
'72 A65 Thunderbolt (twin (I'm sensing a pattern here..))
'78 XS750 Triple (Because I just can't get my hands on
a Rocket Three...)
'87 K100GS (four banger (Because NVT gave up too quick..)
Re: 1969 Trophy 250 restoration [Re: Noah from PA] #787720 10/21/19 4:58 pm
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Ginge Offline
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Won’t this share engine oil with the primary? The late 500’s did. Aren’t these just half a 500?

Good looking project.


'51 C11 in a '54 C10L frame..."The Bantam Eater"
'70 Triumph Trophy 500. Bottom end rumble awaiting diagnosis
'72 Triumph Tiger 650. Back on the road...
Re: 1969 Trophy 250 restoration [Re: Ginge] #787725 10/21/19 5:39 pm
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triton thrasher Online Content
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Originally Posted by Ginge
Aren’t these just half a 500?


More like an inflated Tiger Cub.


Amateur Loctite enthusiast.
Re: 1969 Trophy 250 restoration [Re: Noah from PA] #787732 10/21/19 6:59 pm
Joined: Dec 2004
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kommando Online Content
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Closer to a 1/3 of a Triple as bore and stoke are identical, a Triple piston goes straight into a C15.

Re: 1969 Trophy 250 restoration [Re: Noah from PA] #787739 10/21/19 8:22 pm
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Al Eckstadt Offline
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Here are links to Parts Book and Workshop manual. Scroll to the bottom of this page...
http://vintagebikemagazine.com/links/
Now all you need is an Owner's manual which I bet you could find with a persistent search of the internet.
Al


Al Eckstadt
Re: 1969 Trophy 250 restoration [Re: Noah from PA] #787766 10/22/19 12:53 am
Joined: Nov 2011
Posts: 295
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koncretekid Offline
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Best source for parts is BSAunitsingles in New Hampshire. Peter Quick is the owner and he posts here and on B50.org. He carries the Rupert Ratio books which are the "bible" for the singles.
Tom


Life's uncertain - go fast now!

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