Madcoop
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Thanks Marcel. 😉
I have the bike built back up now and managed to get her out in between showers. I’ll grab a clutch kit off you at some point over the next couple of weeks and proceed as you suggest. I’m not hugely worried about the prawl forks, just something I had read! The problem has only shown itself a handful of times, and selecting gears has never been a problem once I had adjusted the clutch at the engine swap. Initially 5th wasn’t there, if you remember my post last summer, but it didn’t take me long to find it again once I fiddled with the clutch. Based on that experience I would be even more inclined to think worn plates.
We need to talk gearing, but when I do the sprockets I’m going to go with the 520. I threw a new 428gg on it which has been fine, but I still think it could benefit from the 520.
First things first though. I want to see how it’s goes with the new clutch. Once that is in we can hopefully put our heads together and make an informed decision about the sprockets. I should have the clearances checked by then too. They were fine last summer, but I’ve put 1.5k on it since and don’t know the history of this engine. Never missed a beat yet tho, so worth looking after!
Thanks Marcel. I have now had time to fiddle a little bit more and am pleased to report that 5th is back in the room!
Simply a case of slacking off then readjusting the clutch cable again. Took her out and immediately found fifth to be problematic at higher rpm….okay down low tho. Pulled over, put a little more on the lever adjuster and bobs your uncle!
I then went and took my first proper ride on her since picking her up nearly four months ago. We covered nearly 50 miles in all, with a couple of stops just to check her over but really it was a trouble free ride. 🙂
I have a lot on at the moment, but I’m now happy that the bike is ready to go and do the runs required to read the plugs and make the necessary mixture adjustments we spoke about a while ago. For now though, the settings on the replacement carbs seem pretty good.
Quick update, and 5th is definately still there. Need to go out and do some more testing, but without the engine running I am able to shift into all 5 gears. What I did notice is that after changing to 4th I was unable to select 5th exactly as it had been when riding. Then, when I rocked the rear wheel with upwards pressure on the selector, it slipped straight in. Seems strange that it wouldn’t go in when riding, as the motion of the back wheel was what allowed it to slip into 5th with the engine off.
I don’t know much about the gearbox setup on bikes, but it seems to me that this is just an adjustment issue. Something seems just a hair out, and if it will actually shift into 5th, then this will rule the pawl spring out, right?
I will have a closer look at the adjustment on the connecting rod and see if this will make any difference, but it seems that something in the gearbox selector assembly is coming to a hard stop between 4th and 5th.
That copper ring has to go lol
Thanks again Marcel. I had actually turned to the parts catalogue and seen that it was indeed a gasket. Just wasn’t sure, because this one is welded in!! The fella I bought it from broke his hand the day before it was due to be collected. It still had the rusty old downpipe on it and had contacted me to ask what to do. My answer was to tell him to do the best he could, but if need be just send it as was. He ended up asking a neighbour to help removing the pipe and having spoken with him, I think he was quite annoyed himself with the resulting damage. He still should really have told me before it was on my doorstep.
No harm done though, the damage isn’t too drastic and should clean up well enough. New gasket should get me a good seal once I deburr the outlet. I’ve been painting parts all day, so I haven’t really got to the engine, but I’ll knock out the work on that over the next week or so. In an effort to make the engine look a bit fresher, he has blown over the cylinder heads with grey primer. That is going to need fixing with some matt black, but thankfully he was quite accurate with the primer, and applied it using card to shield things that didnt need paint. Not too much overspray given its been a rattle can job, but I think I’ll be putting the matt on with an airbrush for accuracy.
Don’t get me wrong, I’m not going for split new cleanliness on this bike, but a bit tidying up doesn’t go astray along the way. Innfact, it would be rude not too.
Thanks again for your help Marcel, and keep an eye out for my next uncertain moment…lol
Aaahh, it all becomes clear. I have read about some emmision stuff from NZ, where they delete it. Makes sense now. Thank you.
She’s out of surgery now and I’m glad to say it all went well. I just need to worry about cleaning up the copper ring round the exhaust exit. It’s well mashed to the extent that I think there may have been a drill used too!
That ring isn’t per chance a changeable gasket is it? That would make life so much easier.
Thanks for making sense of that for me Marcel. 😉 Nice easy delete too. I hate when I am faced with something I don’t understand.
Here you go mate. A visual representation of Marcels info above. Set everything as you see here when the flywheel is aligned with the relevant mark (F or R) for each cylinder.
Page 88 of the service manual that you will find here:
https://www.manualslib.com/manual/406853/Hyosung-Comet-125.html
Hope this helps buddy.
Hi Marcel, and thanks for such a concise reply. I have in actual fact already read through a lot of the posts on the forum. Particularly those that I thought would be relevant to me.
So far, I have changed the plugs, stripped and cleaned the carb, swapped out the fuel and vacuum lines as per your guides and have a fresh filter and oil to go back in when I get to that point.
Unfortunately I have already come up against a stumbling block, leaving me with the valve covers off and scratching my head slightly and unwilling to rebuild until I am happy with what I am seeing. I am sure I will get my head round the problem but please look out for my post later in the relevant section regarding today’s findings. 😕 Perhaps you will be able to clear up a few of my questions.
Thanks again for your reply, and I look forward to chatting more during my journey with this lovely bike.
