Thumper Club Forum
Club House => Chatter => Topic started by: Propellor on February 23, 2019, 04:05:44 PM
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Further to previous posts regarding swapping out junk Enfield o ring chain to non o ring type, I tried out my new oiler today in the bonus February weather.
Result is good.
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Are you sure that's oil in that hip flask?
Be interested to know how you get on as I now need my fourth chain at 20000 miles. Oh and my third set of sprockets!
Ian
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Are you sure that's oil in that hip flask?
Be interested to know how you get on as I now need my fourth chain at 20000 miles. Oh and my third set of sprockets!
Ian
Yes Ian, I keep my whisky in another one on the right hand side ha ha.
I'll keep you updated.
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Bit of an arty farty shot showing the glorious view over the reservoir. Oh and my hand carved ally parts 😁
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Great shot and great work. Got any more pics? :P
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Thanks 👍. It was a great way to kick off this year's riding. Threading my way around the tiny roads linking fewston, swinsty and thurcross reservoirs. Fair bit of dry salt knocking around but I gave Norman a good wash 😯😁. All the winter mods work well especially the functioning of the hip flask and a more hidden mod which ditches a pathetic intake snout at the back of the right-hand box (the air filter box). The surface area of the snout was pathetically small, probably a noise reduction thing. It has gone now and I have an ally plate covering the general area to stop muck getting in but it "fills out" the sound and seems to allow the motor to rev a bit more freely. It ran better than it has done since I've had it.
Another shot.
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Don't know how to download multiple shots so here's another, showing of the lovely sunshine 😁😂
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If ever I go to buy an Enfield, your model is looking favourite! Although, here's one that was on fleabay I kind of liked after watching Easy Rider - before and after pics;
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Great shots Andy and a lovely looking ride.
I have to say I love my Enfield but it really is a turd that I have to keep polishing. Today I discovered that despite constant lubrication and adjustment there are 6 teeth missing on my rear sprocket! I am a little fed up with the poor quality of components on the Mighty Bullet but as I can't afford the silly prices people want for motorbikes these days I am stuck with it. Now where's my turd polish!
Ian
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Cheers Matt.
Sorry to hear of your woes Ian.
This is possibly not related to your exact issue but worth a mention. As part of my modifications to the mounting and rotating the mudguard I removed the shocks and jacked up the rear wheel to simulate bottoming of the suspension, to ensure the tyre clearance was ok. What I noted was how tight the chain gets at this position, in spite of having decent slack set into it on the sidestand. I believe that the swingarm on my model is a bit longer than on yours so it is possible that the phenomenon is more pronounced with your bike....?
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Don't know how to download multiple shots so here's another, showing of the lovely sunshine 😁😂
"Showing the lovely sunshine " mmm..... I noticed how Norman still get his rear end in there tho. Ooo eerr vicar 🤣🤣🤘
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Cheers Matt.
Sorry to hear of your woes Ian.
This is possibly not related to your exact issue but worth a mention. As part of my modifications to the mounting and rotating the mudguard I removed the shocks and jacked up the rear wheel to simulate bottoming of the suspension, to ensure the tyre clearance was ok. What I noted was how tight the chain gets at this position, in spite of having decent slack set into it on the sidestand. I believe that the swingarm on my model is a bit longer than on yours so it is possible that the phenomenon is more pronounced with your bike....?
Thanks Andy it's a thought and worth checking. I have decided to convert to a bolt on rear sprocket. Hitchcocks sell a conversion rear hub with the teeth machined off and then you can buy a bolt on sprocket made by Talon. These should be much better quality than the Indian ones. However the bolt on hub is £96, but as I have a spare with missing teeth, a friend with 40 years engineering experience and access to a fully equipped machine shop I won't be paying that!
Ian
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My model has a separate rear sprocket, mounted the way a typical jap bike is. Different swingarm too.
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a friend with 40 years engineering experience and access to a fully equipped machine shop I won't be paying that!
Ian
Oh you lucky man Ian.... one can dream 😉👍. Best o luck with the sprocket conversion.
Cheers, Michael
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a friend with 40 years engineering experience and access to a fully equipped machine shop I won't be paying that!
Ian
Oh you lucky man Ian.... one can dream 😉👍. Best o luck with the sprocket conversion.
Cheers, Michael
I second that emotion and it's not coming from a welding/cutting/forming genius, it's coming from the bottom of the meccano end of the technical ability chain, i.e. drill (no pillar) :'(
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Thanks guys. The reason I need a friend with 40 years engineering experience is that if I drill two holes one of them misses!
Ian
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When you drill square holes then you know you're bad 😁😁
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Just an addendum to my post about missing teeth. I decided to investigate a little and found that I could cut my ruined sprocket using an ordinary hacksaw with a not particularly new blade. I tried the same on a BMW F650 front sprocket I had lying around and of course the hacksaw had no affect whatsoever.
So I think the sequence of wear goes sprocket made of mild steel hooks within a short mileage, hooked sprocket wears chain. Fucking Indian crap! The sprockets that Hitchcocks have made for the bolt on conversion are made by Talon so will be properly hardened presumably and will therefore stop the premature wear process.
I still love the Mighty Enfield though.
Ian
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Hi ian. I have some experience of industrial mechanical power transmission from a previous life, but we never did any roller chain drives. However, a few things to ponder. The front sprocket , although the teeth feel the same force as the rear sprocket, they are subjected to it more often for obvious reasons. I've always understood the main cause of tooth hooking is stretched chain. The reason being that a stretched chain is longer between each centre and so adopts a position further out on a greater pitch circle. I'm sure lubrication obviously play an enormous part, as does material quality.
One theoretical way to reduce the force going though the chain and the pressure on the tooth is to increase teeth numbers on both sprockets. The penalty is higher circumferencial speed, though this is hardly a problem on an Enfield! The main restriction is the lack of clearance around the gearbox area (on all bikes, not just a mighty enfield)
None of this really helps! 😄
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Would it be worth looking into swapping over to a disc rear hub setup? This comes with a bolt on rear sprocket like a typical jap bike. Probably not worth it?
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Thanks Andy.
I found your insights interesting, as always when someone knows something in depth it makes me realise there is always more to consider than at first sight.
Swapping over to a bolt on hub would I fear be prohibitively expensive but I am going to pursue converting my rear hub to bolt-on.
Ian
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Thanks Andy.
I found your insights interesting, as always when someone knows something in depth it makes me realise there is always more to consider than at first sight.
Swapping over to a bolt on hub would I fear be prohibitively expensive but I am going to pursue converting my rear hub to bolt-on.
Ian
Good luck mate. Hope it works out for you, as I'm sure it will. Keep us posted.