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Messages - cpp01

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1
British Bikes / Re: TR25W- Exhaust valve problem?
« on: March 27, 2011, 07:31:55 PM »
Hello,

Sorry for the slow response, been at relatives this weekend.

Thank you for your responses R and Goldy. I've not had a chance to examine things again but I do have some questions! Don't read them as an attack on your suggestions, just me trying to understand the problem better.

The valves were replaced about a year ago and have had less than 250 miles use. Does this make it any less likely that the valve has stuck, this combined with the fact it would have stuck after 30 miles of riding. I might not understand the mechanisms with which a valve would stick properly, but surely it would be at the start of a journey? Is it just a build up of dirt which would cause sticking or is it a tight valve expanding and sticking inside the guide?

I'm also quite surprised at the small amount of movement in the cam follower, I actually noted this before replacing the push rod (watched it using a mirror, the inlet rod appeared to move a lot compared to this one). I thought perhaps the exhaust cam follower had dropped which allowed the rod to fall out of place (indication of a failed cam shaft/cam follower?).

With regards to your question, there was a very large valve clearance (>>0.25 inches) when I started to look at the problem. I adjusted this back to spec but the push rod movement is so small it isn't really shifting the valve at all.

I'm not going to get a proper look at the engine until next weekend but look forward to any suggestions you have.

Thanks again for your help.
cpp01

2
British Bikes / TR25W- Exhaust valve problem?
« on: March 23, 2011, 08:53:29 PM »
Hi all,

I took my TR25W out for a longish run (30 miles) on Saturday only for it to lose power fortunately close to home. On inspection the push rod to the exhaust valve had come out of place which I thought was very strange. Trying to refit the push rod in position I found that it was sitting fairly high but through a bit of bodging I managed to refit it in place, in doing so the component which goes between the push rod and cam shaft dropped back into the normal(?) height position. Now when I kick the engine over the inlet valve moves up and down a reasonable distance but the exhaust valve push rod/rocker arm barely moves at all. There is also an occasional 'pinging noise' but I'm not sure of the source.

The engine has compression, fuel and electrics.

Does anyone know what the problem may be? Being a pessimist I suspect the cam but I'm not sure how to work this out without strpiping down the engine.

Any thoughts/help would be greatly appreciated.

Thanks,
cpp01

3
British Bikes / Luggage rack- TR25W
« on: February 20, 2011, 08:57:24 PM »
Hello,

Been a while since I last posted. I'm looking for a luggage carrier for my TR25W but have yet to see one anywhere except already on bikes. Does anyone know where I can get one from?

Thanks in advance for your help.
cpp01

4
British Bikes / Re: Sticking clutch
« on: November 23, 2009, 07:07:05 PM »
Thanks for the response (sorry for my delay in getting back). That used to be part of my start-up routine, don't know why I don't do that anymore. I'll see if it cures the problem!

Thanks again,
cpp01

5
British Bikes / Sticking clutch
« on: November 08, 2009, 10:53:34 AM »
Hi there,

I have an irritating problem with my '68 TR25W, if it sits for a while (week or two) the clutch sticks so I cannot put it into gear whilst the engine is running. If I let the engine run for a while and get warm the clutch releases and I have no more problems for the day. What can I do to fix this? I suspect a clutch strip down and clean up but if that's the case it won't be done until next spring/summer as I work outside! I'll probably change the spirngs etc whilst I am at it.

I've recently changed the clutch cable (no symptons before this, but new length is correct etc) and changed all of the oils in the bike. In addition the bike has been rebored although I do not see this affecting the clutch performance.

Thanks for your help in advance.
cpp01

6
British Bikes / Re: Help! "New" old BSA Starfire 250
« on: October 30, 2009, 06:59:10 PM »
Oh, I meant to say that mine's has a sidestand but no centre stand. No position for a centre stand either as far as I can tell. Makes maintenance a bit harder. Ideally you'd want both, centre stand better than side in my opinion though.

cpp01

7
British Bikes / Re: Help! "New" old BSA Starfire 250
« on: October 30, 2009, 06:57:43 PM »
Hi Dave,

I have the Triumph equivalent of your bike same year. The trick I've found to start it easily is:

1. Tickle carb until fuel comes out
2. Kick over engine once or twice ('preloads' the cylinder with fuel)
3. Turn on ignition
4. Tickle carb again
5. Kick start engine first attempt (maybe not every time!)

I got the trick from someone with a 'newer' model, works a treat.

If you're happy playing with points etc then leave them in. If you're a bit lazy like me then fit electronic ignition and the bike starts even easier with no need to tweak points.

Make sure you keep an eye on valve clearances on the bike, these will affect starting along with everything else.

I'm sure you will enjoy the bike, easy to work on and great fun to ride.

cpp01
UK

8
British Bikes / Re: 1971 truimph
« on: September 10, 2009, 08:27:18 PM »
Hi,

I've got the 1968 TR25W, the older sister of the trailblazer. I did know someone with the T25SS for a while, good little bike very similar to the TR25W (based on same engine). Many of the parts on these bikes are the same as those used on the BSA B25, simply badged differently.

I'm afraid I cannot speak for the US/Canada but there are lots of dealers in the UK who can supply parts and I suspect its the same in the US/Canada too.

In no particular order:
UK suppliers include eBay (lots of bits on there under TR25W/T25/B25 etc)
https://www.feked.com/shop/
http://www.britishspares.com/
http://www.draganfly.co.uk/index.html
http://www.tms-motorcycles.co.uk/store/products/list.asp?cat_id=42
http://www.grintriumph.com/
http://www.btinternet.com/~hawkshaw.motorcycles/triumph7.html
https://trisupply.co.uk/index.php
http://www.motorcycle-uk.com/britbits/
http://www.suprememotorcycles.co.uk/BSA_Triumph_Unit%20Single_B25-C25-TR25a.pdf

eBay and the last one are the ones I've used in the past. I think many of the dealers will ship to the US if you get stuck. These models of bikes are, generally, very easy to get parts for.

Workshop Manuals/Parts Lists are very useful for working out what the parts are on your bike and ensuring you get the correct replacements.

Doesn't quite answer your question but hopefully gives you some leads.
cpp01

9
British Bikes / Re: Petrol tap cork
« on: March 13, 2009, 07:38:46 PM »
Hi,

If you want to keep the cap and just change the seal then new cork seals are plentiful on eBay and are cheap, just measure up what size you need. Discussion about getting them to squeeze on here http://www.vintagebike.co.uk/cgi-bin/yabb2/YaBB.pl?num=1234644389/0.

Hope that helps,
cpp01

10
British Bikes / Re: Cork fuel tank cap seal
« on: March 13, 2009, 07:36:16 PM »
Hi,

Sorry for the delay in getting back to you all. The cork is now in place! After trying the hot water technique described I left the cork for a day or two and it dried out, shrunk a bit and now fits in place without any further 'tampering', a bit tight but good!

Thansk for all of your help.
cpp01

11
British Bikes / Re: Cork fuel tank cap seal
« on: February 15, 2009, 02:48:29 PM »
L.A.B., thank you for the advice but it didn't work I'm afraid.
Unless there's any other ideas I think I'm just going to have to reduce the thickness of the seal slightly.

Thanks,
cpp01

12
British Bikes / Cork fuel tank cap seal
« on: February 14, 2009, 08:46:29 PM »
Helllo,

New member and new to classic bikes. I've just bought a new cork seal to replace the missing seal in my fuel tank cap and despite it being the right diameter (ID + OD) I cannot get the cap to fit back onto the tank.
Is there a special trick I meant to be using or is the seal I've bought too thick?

Thank you for any help you can give.

Regards,
cpp01

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