Sinnis Apache 250 EFI chain rubbers

HELP again, guys... CHAIN RATTLE
Heard a new rattle yesterday and just tracked it down to the chain - as it still happens when I cut the engine power, or free wheel in neutral. Seems I may have lost a rubber block below the chain but I'm guessing here. so I'm hoping someone can confirm.

Is there a rubber runner under the chain, mounted just above the spring of the side stand? I've put some blue tape on the metal thats now rubbing the chain, causing the rattle - see photo. It's stopped the rattle but obviously I can't ride it like this. SHOULD THERE BE A RUBBER BLOCK ON THERE (where I have the blue tape)?

My guess is yes, and that It's fallen off...

Attachment 19649

Attachment 19648

Dunno of rubber, there could had been a strip of plastic? Chain slides on plastic good.

Thanks Mollami. I know of someone who has the exact same bike so I'll email him and call him tomorrow.
It could just be a slack chain, but it still shouldn't rub on metal...

I'll update this post anyway, just for others to reference in the future.

Adjust proper chain slack and rattle should stop.

If you are the one who doesn't like to gape every day what you need to do with your bike, installing some chain tensioner (check on Aliexpress) would solve this rattling problem practically, for good.

GAPE everyday?

Good call with the chain tensioner. I was looking at some on ebay last night :-)

UPDATE: not fixed.

Called dealer, who said tighten chain. Chain tightened and still rubbing metal, making clanking sound - taking it to dealer now. No other option than to ride 15 miles with metal on metal.! Not happy. Will report back.

From the picture of the Chain slides there look a bit short to me?
Try to find some other type that fits and are longer

UPDATE: dealer looked at their online manual and found a chain guide has fallen off. Ordered one up for me, at £5.00GDP + postage, due to arrive in a few days - I'll post a pic for future reference.

In the meantime, as a short term fix, I've bent back the metal bracket which the missing chain guide bolts on to, so it doesn't catch the chain. Greased and tightened the chain and riding it gently :-)

Quote:

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Originally Posted by mark.evans101

GAPE everyday?

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What, I made mistake? My English is pretty bad, so let me rephrase - if you are the one who doesn't keep track everyday of the chain state.

Quote:

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found a chain guide has fallen off

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Hi Mark

You will find with most of the cheap end bikes made in China that you need to check ALL the bolts and use some Loctite.
Very common thing and we hear it all the time here on MCM.
Happy you have sorted it out, just go out tomorrow and check the bike over for other fallen or losses items.

Zorge - no worries mate. I check my tyres every day and chain tension most days. Always wipe the bike down after wet rides too. Keep it covered at work with an Oxford bike cover. All helps.

Prince 666 - The good thing about tracking down the noise is that I took the bash plate off, cleaned the engine and checked all other nuts & bolts. Loctite will be used when I fit the replacement part. Also, it's good to know my dealer has the online parts manual ...but I just wish I had a copy of it, lol.

Quote:

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Originally Posted by mark.evans101

...but I just wish I had a copy of it, lol.

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http://ndshop.yukimoto.cz/index.php?pg=katalog Yuki SM efi = QM250gy-D use Google Chrome's auto translate or find something that Czech > Eng
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萬變不離其宗
<Carb> STX 200/250 parts manual http://www.puzey.co.za/spares.html is very similar

Great link - thank you so much, Humanbeing :-)

It's part no. 16 that I ordered via my dealer - a rubber block that had fallen off. It holds the lower chain off the side stand bracket.

Attachment 19650

Hope to collect it on the weekend, fit it and post a photo.

The missing part that fell off; a "Block Nether" - small white plastic block that bolts under the chain, on a bracket just above the side stand bracket. Easily fitted, after slacking off the chain a little. Can only be fitted one way. Screw to the rear with the white notch fitting into a hole at the front. Had to use open ended spanner as its at an angle so no way to use a socket. Cost me £6.00 inclusive of postage via my local bike shop. Mount Motorcycles, Port Talbot, S.Wales, UK.

Attachment 19655

Attachment 19656

1. Raised bike on blocks under the frame.
2. Slacked off rear axle bolt, the two lock nuts and then the two nuts for adjusting the chain.
3. Fitted new part
4. Bent the end of the bracket back up with a hammer and screwdriver - had to bend it down whilst waiting for new part to arrive, to avoid chain rubbing on it.
5. Adjusted chain and tightened axle nut.
6. Took it for a 6 mile run the re-adjusted the chain as it had slacked off a little.

Job done:-

Attachment 19657

Attachment 19658

Hope this helps someone in future :-)

LESSON: check all nuts are secure and tight on a weekly basis, as well as applying lube, checking tyres and chain etc.

Good report and fitting instruction, thanks for posting.
Bike now all up and running until the next part falls off.
Hopefully, now you have a better understanding of Chinese bike, and you have checked most item now? and prevention is better than a cure?

:thumbsup:

Yes, learned a lot. Had zero problems with my previous bike over 3 years, my little Honda CB125F ...and a few issues in just 3 months with my Chinese bike. Good to learn, good to check weekly

Rubber?!!! I would suggest it's made from some strong & low friction plastic material. PTFE/ UHMW blocks is good candidate for those that can make something from scrath

I am impressed you got the part, very good!