sparticle Posted July 14, 2019 Report Share Posted July 14, 2019 Hello, I bought a TY 175 Road Registered brand new in 1980. I just bought another yesterday that looked almost the same but with no lights etc. and this one had never road registered. I remember stripping mine down and painting the frame red in 1981. I remember going to shirts workshop when they were building the Majesty's but could never afford one at the time. This one was advertised as a good runner!. After getting it back and attempting to get it running. We ended up stripping the fuel system. Tank off and flushed about 20 times to remove massive amounts of rust buildup. Carb off and cleaned out no damage to needle or slider jets etc. Std 240 Main. We could get it to run on choke and tick over on choke. Bogs down and no tickover without choke. Very smoky. Needle was on the 2nd ring so lean ish. Moved it to position 4 as per std still no tickover without choke. Removed carb again and checked all jets orifices etc. Checked float level 21.3mm close enough I think. Air screw at 1.5 turns out as per manual. Air filter had disintegrated so made one from car seat foam as temporary measure bit probably a bit dense. We then noticed an oil leak. Kick start had been replaced and put on shaft in the wrong place so the clamp had holed the case on its return!!! On inspection it had been done before and they had araldited the crack and it had been previously welded, I guess just to get it sold!!! Getting that welded as we speak. Anything we must do that we have not so far? We have not touched the electrics at all or even pulled the spark plug. It did kick up straight away with choke and tick over ok with choke. Smoke may be due to our heavy mixing. Oil pump had been disabled but not removed. We would like to take the opportunity since we have the clutch cover off to remove the oil pump shaft entirely. I remember once my TY was out of warranty the dealer fitted some kind of blanking plate and then I ran it on pre mix. Doubt any of those exist today so might get welder to weld a plate over the shaft hole that should sort that and give me a tiny bit of power back Anyhow, just wanted to say hello , ask for any suggestions and I look forward to getting this thing running as sweet as I remember mine. Cheers Spart Quote Link to comment Share on other sites More sharing options...
wuckfitracing Posted July 14, 2019 Report Share Posted July 14, 2019 I would treat it to a new plug at least. Quote Link to comment Share on other sites More sharing options...
sparticle Posted July 14, 2019 Author Report Share Posted July 14, 2019 54 minutes ago, wuckfitracing said: I would treat it to a new plug at least. Just ordered a couple of hundred quids worth of bits from these guys https://www.tytrials.co.uk/ , full gasket set, new rear mudguard (existing one broken), Air Filter element, plug, found a blanking plate for the oil pump, carb service kit (gaskets O rings etc.). See how that goes. Cheers Spart Quote Link to comment Share on other sites More sharing options...
section swept Posted July 14, 2019 Report Share Posted July 14, 2019 The oil pump blanking plates with gaskets are still available from Chase TY and other good shops. The blanking plates are a piece of cake to fabricate, just make sure the gaskets are well sealed. Crankcase oil seals may be worn which will affect engine running. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted July 14, 2019 Report Share Posted July 14, 2019 I would say that the reason it bogs down without the "choke" is because you haven't fully cleaned out the pilot jet circuit Quote Link to comment Share on other sites More sharing options...
sparticle Posted July 15, 2019 Author Report Share Posted July 15, 2019 (edited) 8 hours ago, feetupfun said: I would say that the reason it bogs down without the "choke" is because you haven't fully cleaned out the pilot jet circuit Convinced this was as clean as could be. But will clean back through the carb etc. whilst the bike is disabled and the case being welded. Don't remember mine being such a pain, but then it wasn't 40 years old! Cheers Spart Edited July 15, 2019 by sparticle Quote Link to comment Share on other sites More sharing options...
trialsrfun Posted July 15, 2019 Report Share Posted July 15, 2019 (edited) You need to replace the O rings that surround the jets these fit into the float bowl and when worn cause all sorts of running problems. Edited July 16, 2019 by trialsrfun Quote Link to comment Share on other sites More sharing options...
FreeWheel Posted July 15, 2019 Report Share Posted July 15, 2019 Make sure that the oil inlet hole on the carburettor from the oil pump is blocked off, Caused me some problems. Quote Link to comment Share on other sites More sharing options...
sparticle Posted July 18, 2019 Author Report Share Posted July 18, 2019 Thanks for all the suggestions. I just got a carb service kit so hopefully that should help. Its got all the o rings etc. Cheers Spart Quote Link to comment Share on other sites More sharing options...
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