Chain and sprockets

[yorkie_chris]

My chain has no stiff links, it's on 25k.
But, it's knocking a bit at low speed. I think because the teeth on the rear sprocket are a bit hooked.

I've got another C+S kit here, so do I sling that on, or just change the rear sprocket and hope to get another 5-10k out of it?


P.s it's 3 teeth up on the back, so chain isn't under that much load in use. Most of wear is me being hamfisted and forgetting to fill scottoiler.

[Spikenipple]

Really the whole lot should be replaced, but as long as you keep an eye on the condition of the chain I imagine it'll be fine.
+3 teeth on the back? What does it redline at in 6th? 80mph? :D

[Mr Speirs]

Normally I would say they need to be replaced together but to be fair YC you know what you are doing.

[yorkie_chris]

What does it redline at in 6th? 80mph? :D

140 indicated on the limiter, but I've heard you need to grab someones slipstream to hit the limiter in top.

[thefallenangel]

how much is a rear sprocket? If it's only a tenner then yes as it saves the hassle of replacing the lot but look for any wear in the rollers on the chain too. Also before you do it check the front sprocket is clean, blah blah.

Man i feel like i'm teaching granny to suck eggs.

[yorkie_chris]

A rear sprocket is £20. Full drive kit was 100 or so.

[xXBADGERXx]

From my experience I have learnt that once they start doing this they are on their way out , remember mine at the GMII ? . It sounded terrible , I had 27k out of it before forgetting to fill the Scottoiler one month . I knew it needed doing before I went there , I had to slather it with chain lube at every other stop even with a Scottoiler on and filled up . On the way home it got progressively worse and was "Chunking" at 85 mph . I got the bike home by the skin of my teeth and replaced the lot within the week . Funnily enough my chain was fine and the same with the rear sprock ... it was the front that was hooked ? . Maybe due to carrying lots of luggage and being 2 up a lot this year ? . I felt like replacing just the front but as an engineer I have replaced many parts of conveyors including chain driven ones and have learnt from the past that it is folly to do so . It`s just a bodge to get a handful of extra miles out of it . If I was touring the world and needed to do a few k to get home then yes .... from an economy point of view ..... change the lot over as your new sprocket may not wear to the old chain , you may make the chain wear to the new sprocket if it has lost the ability to stave off any wear .

I have seen sprockets in industrial situations that may have been slightly harder than the chain they are mated to , the chain has lost any hardness due to wear , almost as if the surface hardness has been worn through and it`s down to the softer material underneath . This is on something very industrial with the possibility of many millions of revolutions ........ but stuff like that tends to stick in your mind . Now stop faffing about and replace the lot young man :)

[maviczap]

YC, I've got a chain and sprockets from my SVs which has only done about 7.5k. It's just sitting in the garage. Think its ok too, I just replaced it with a bling gold one, which you won't like :p

The chain is unsplit as I removed the swingarm last winter

Just pay me the postage.

let me know by PM

[xXBADGERXx]

There ya go , Bargain , matching set.......ish for the price of a packet of ciggies and a Beer

[yorkie_chris]

I've already got a new set here maviczap, I appreciate the offer but I need to do something today (will be doing 1000 miles this week with no time to be working on bike).

Cheers for the offer but better to hang onto them for someone else who may need them more than I.

That said, don't chuck them out, they can sit in my garage in case anyone needs them if you want rid.

[maviczap]

No worries YC, I won't be chucking them out.

I'll post them in the for sale section this week sometime.

[rowdy]

I've already got a new set here maviczap, I appreciate the offer but I need to do something today (will be doing 1000 miles this week with no time to be working on bike).

Cheers for the offer but better to hang onto them for someone else who may need them more than I.

That said, don't chuck them out, they can sit in my garage in case anyone needs them if you want rid.
Chuck the back sprocket on then change the rest when you have more time then.

[Nobbylad]

Whilst we're on the subject, I've just replaced my OEM C&S after 16,000 miles with new Tsubaki Alpha (or was it Omega?) chain and JT sprockets. Is it likely that the new chain will stretch after the 1st 50-100 miles? Obviously I'll be checking it each weekend, however with 500 miles in between each check should I check it sooner with it being new?

[Owenski]

Normally I would say they need to be replaced together but to be fair YC you know what you are doing.
+1

[Dave20046]

If it was me I'd let lazyness override tightness and do the whole lot all together seeing as you've already bought it, that way you won't have to touch it (apart from maintenance) for a fair while.

[xXBADGERXx]

Whilst we're on the subject, I've just replaced my OEM C&S after 16,000 miles with new Tsubaki Alpha (or was it Omega?) chain and JT sprockets. Is it likely that the new chain will stretch after the 1st 50-100 miles? Obviously I'll be checking it each weekend, however with 500 miles in between each check should I check it sooner with it being new?

Are you running a Scottoiler ? , I fitted my Tsubaki C+S and didn`t need to adjust it , in fact I only adjusted it when I had to take the wheels in to get new Tyres fitted .

[yorkie_chris]

Well I couldn't risk not having anything to go down to wales on tomorrow (not taking that POS GPZ any further than I can possibly avoid). And I couldn't get hold of a sprocket in previous size I had on there (+3 teeth). So just bit the bullet and fitted the lot.

Lovely and smooth, but I keep trying to change down from 1st.

[xXBADGERXx]

Good lad , which way are you going to Aberystwyth Chris ?

[yorkie_chris]

From luckypants house straight down a494-a487.

How long do you reckon it will take me to get from aber to the 11.15 rendezvous?

[xXBADGERXx]

Ed would be your best bet for that question mate or Daryl even , I wouldn`t like to say as I only ever come from Aber and head north . You could try Multimap as that will give you a fair guesstimation of time then add time to that for any probs . I am probably gonna head to Lucky`s and travel from there .

[yorkie_chris]

Ok, google reckons 2 and half hours. Multimap reckons 3 hours.

Anyway have a good trip, I'll be long gone from mikes house by the time you get there I imagine.

[xXBADGERXx]

Sounds about right mate , I`ll see ya there bud , and glad you saw sense and changed the lot , I bet it`s like riding a bike made from Cadburys Galaxy bars now eh ? ;)

[Rocket]

YC. No egg sucking but have you had a look at the front sprocket? Normal sequence of events is chain lube fails and chain wears. Pitch length of chain alters. Front sprocket gets hooked well before rear sprocket as it has far less teeth on it hence turning faster. This assumes that your front and rear sprockets are made of equally good material.

[yorkie_chris]

Yeah it had a new front sprocket on it about 7k ago, the old one was proper fooked. Would have had loads more life out of the chain if I'd swapped that before it got so bad. Meh.

[xXBADGERXx]

YC. No egg sucking but have you had a look at the front sprocket? Normal sequence of events is chain lube fails and chain wears. Pitch length of chain alters. Front sprocket gets hooked well before rear sprocket as it has far less teeth on it hence turning faster. This assumes that your front and rear sprockets are made of equally good material.

That`s what happened to mine , I had run out of lube for a bit but I seriously thought I had a front Sprocket that maybe wasn`t case hardened properly ........... Then I found a problem with my Scottoiler , it turned out that in order for it to work properly you have to get off yer hairy a$$ and get the oil from the workshop and fill it , who`d have thought eh ?

[yorkie_chris]

That is main problem with scottoiler, it's ace, but when you forget about filling the bugger up the oil is that thin it dries up straight away.

[xXBADGERXx]

I have mine routed in a way that I can see when the tubing runs out now , a lot better than my Uber-hidden old setup .

[yorkie_chris]

Ahhh, because I used a load of secondhand diesel straight mineral oil out of my mates landy the tube turned opaque.

[xXBADGERXx]

Hahahahaaaaaaaaaaaaaa , is the tube still soft or has it petrified ?

[yorkie_chris]

Nah still flexible just covered in orrible stuff, you can see oil in it if you shine a light through it.

[dyzio]

Do you re-adjust yours for rain riding?

[yorkie_chris]

Nah just run it as high as possible without splashing oil on the tyre.

[xXBADGERXx]

Set mine so it flings onto the rear wheel and then back it off a couple of stops .

[dyzio]

That's what I'm trying to do as well.
Does your chain look dry after a few (~20-30) miles of rain riding?

[yorkie_chris]

Nope, still fair wet with oil. That's just cheap 10-40 from the supermarket at the moment.

[dyzio]

I'll need to turn mine up then. I'm getting 400-500 miles from the reservoir with old 15-50 + sthil mix.
Works fine in the dry, but after a rainy 30 miles chain looks dry.

[Dave20046]

I'll need to turn mine up then. I'm getting 400-500 miles from the reservoir with old 15-50 + sthil mix.
Works fine in the dry, but after a rainy 30 miles chain looks dry.
Could it be anything to do with the positioning of the dripper?

[dyzio]

Could it be anything to do with the positioning of the dripper?
Don't think so, it's getting lubed properly, but washes off in the rain.
I'll try to post a pic later.

[Dave20046]

Don't think so, it's getting lubed properly, but washes off in the rain.
I'll try to post a pic later.
Just wondered if the rain was washing it away before it could get onto the chain properly.
Can't blame me I'm a manual luber:p