how do i fix this? it seems simple

[Smallparrot]

my last tech question that is very important before i can start riding my bike again! the chain is rubbing on the bottom of the swingarm when i ride and the little black wheel that somewhat guides the chain and keeps it on track is what makes it rub on the swingarm. there is now a fairly large gash in the bottom of the swingarm from riding with the chain rubbing so hard on the swingarm. when i push the black wheel down, the chain stops rubbing, but when i let go it will push the chain right back up to the swingarm. i have taken a picture of what i am talking about to better assist anybody willing to help me out. here is a link:

if you notice that black wheel just smashes the chain up into the swingarm. please help me i would greatly appreciate it so i can keep riding!

 

[darb110]

you tryed just taking you chain guide off?? will i run alright with out it ??

 

[Smallparrot]

i was thinking about that, b/c i just looked at some peoples bikes from online pics and a lot of them dont even have one...what is its purpose? im thinking im probably gonna just have to take it off, b/c whoever put this bike together did a terrible job at that part lol

 

[Meko]

Yeah I'd suggest the same thing too. That tensioner is pushing the chain way too close to the swingarm. Is it spring loaded?

 

[Smallparrot]

yep it was. it took me like 5 minutes to finally get a grip on the spring and pry it off the little black chain guide. once i got the spring off, i was able to remove the black wheel which was pushing the chain into the swingarm! now it sounds perfect and the chain doesnt look too loose or too tight atm. is the chain guide really that important?

 

[Meko]

I have one on mine but it is not spring loaded - my son's fell off & he has no probs

 

[Franky]

Cant see the picture but sounds like your rear shock setup is incorrect, if the rear shock is too long or uncorrectly adjusted the rear swingarm is pushed down further than it should, causing the chain to be really tight and rub into the swingarm, The purpose of a chain tensioner is to hold the chain onto the sprocket, without it you run the risk of your chain comming off and causing a bit of damage.

 

[Smallparrot]

sorry i think that link was bad, try this one and let me know if it works now.

 

[Flarry]

This happened on my old bike when I replaced the spring, its the sping being too strong, if it runs allright without it then ok but I wouldnt reccomend doing it.

 

[pegleg]

I take them straight off and replace it with a home made one, here is how I do it.
I grind the rod that sticks out of the frame (where the bodgy tensioner mounts), flush with the frame.
I then drill a 9mm hole about 10mm deep into the end of the section that you just cut off the old tensioner mounting place.(on the frame, Not the discarded piece).
Then get an old skateboard truck and cut a length of axle from it.
This is where it gets important to measure correctly, you need to have enough of the skateboard axle to slide into the hole you just drilled and be sticking out about 5mm past your chain. In order to get enough length out of the skateboard truck you may need to cut through the alloy of the truck itself.
The alloy can be removed by hitting it hard with a hammer, Place it in an old rag or something before you hit it as bits will go flying everywhere.
Now place the axle into the hole and weld it in place. Put the roller on and nut from the truck and Bobs your uncle! A chain tensioner like the good bikes.
I have attached a pic of one I did for a mates bike, His bike never had a tensioner so I lathed this one up out of the old skateboard wheel that came off the axle I used to make the thing. Recycling at it's best.

His chain isn't that bad normally, the bike went into about a 4' hole of water on Saturday, it is now my job to get it going again..

 

[coolmodee01]

dude thats a pretty good idea
bu tbrfore you go "butchering" your frame you might just want to try tensioning you chain properly
from what i can see from your pic the tensioner in it's current position is not even being used the chain looks pretty slack still
when you compress your spring you will either lengthen or shorten the centre distance between your sprockets
if when you sit on your bike and your chain tightens then maybe you dont need to tighten it so much but do it so the chain does'nt touch the swing arm because the chain should put pressure on the tensioner and keep the chain off the swing arm anyway
but when sit on your bike and the chain loosens then you will really need to tighten your chain up so that at it's slackest point the chain doesn't touch the swingarm
the purpose of a tensioner is to obviosly keep tension on the slack side of the drive doing this does the following :-
makes the chain track straight
which help's the teeth mesh into the sprockets properly which reduces noise and increases the life of your chain
in this case not haveing a good chain tensioner will result in the replacement of both stater and magneto case = about $180.00
cost of tensioning your chain properly about 10mins
if you not sure what i'm on about
let me know i can go all day on the subject it's my job

hope the tension thing helps

l8tr

p.s if your bikes new the spring on your tensioner should loosen after a while
chinese stuff isn't that good