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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Oil feed issue need help please
Post Info TOPIC: Oil feed issue need help please
chrishughes1989


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Oil feed issue need help please
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I have a removed the side case and cleaned out the gause and it was full gasket or some other type of plastic (needs new cam chain and maybe slide rubbings)

 

I could do with some info on the following:-

 

Here is a video with the nut cracked below the filter housing.   https://db.tt/iO2UF2r8xU

How much oil should come out from the top of the oil line when the banjo is removed?

Should the oil pump be pumping pressured oil if so then it should be coming out the hole as shown on the video?

How do you know if the cam chain is worn? on my bike on TDC both cam sprockets tilt to the left but the bike runs fine, os there a way of checking the chain tensioner to indicate wear?

 

 

Any help or tips welcome



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JOHNYBOY


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when you line up the camshafts then turn the crank how much backash is there

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chrishughes1989


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if I turn the crank to line up the cam sprockets you can not see the TDC Line in the inspection hole.



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TTRfan


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Hi Chris

I think you have removed the banjo bolt that covers the return feed from the oil cooler when fitted. If you want to check that your engine is pumping oil then the check bolt to take out is the 10mm one front top of that casing. 

If the pump is working then you should get a significant amount of oil coming out so be prepared with a rag.

It would be worth you getting a workshop manual which includes a diagram showing how the oil flows through the TTR engine - see here

This extract from the manual shows the correct position of the camshaft sprockets at TDC. What do your cam sprockets look like at TDC?

Camshaft positions.jpg

Or in real life:

Camshafts.jpg

Ideally the lines should be parallel. If one is obviously off at angle then that is usually a sign of a worn camshaft.

If they are both off at an angle then the chain may have been installed a tooth out. Make sure you are checking with the single line on the flywheel for TDC - not the double one wink

Also see http://ttr250.activeboard.com/t59506155/how-much-free-play-on-a-cam-chain/

Hope that helps.

Brian 



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chrishughes1989


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Yes i Have a manual and when I remove the bolt out it does not pump out the 10mm hole, i am going to have a look at the oil channels tonight failing that il have to remove the pump (I take it there ain't a test i can do while the pump is in position), would the bike run ok a tooth out on the camp chain? as it starts first time every time but they are both out (i will take pictures later)



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TTRfan


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If you don't know the history of the TTR then there is a (remote) chance that the previous owner had an oil cooler on it that was taken off to be sold separately.

Like kickstart kits, oil coolers are like hen's teeth and fetch a lot of beer tokens.

When an oil cooler is removed the internal bolt has to be replaced with one of a different length to allow the oil to circulate internally rather than through the cooler. If not changed then no oil pumped around the engine = costly repair bill no

Check out the oil cooler thread to see what the lengths of the bolt are.

TTRs will run with the cam chain a tooth out but will miss and fluff at higher revs and not make full power.

Brian



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chrishughes1989


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Hi Brian, yes there is a blanking plug in that hole on the video. I was just seeing if i could see any oil pumping through that oil way and it seems i took the return out by mistake, how much oil should come out the banjo at the top of the head if the bike is running ok? I will take a  picture of cams for you too see

 

Thank Chris



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TTRfan


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Did you check out the internal blanking plug bolt?



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chrishughes1989


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Brian believe it or not ive just found this! what length should it be as it bolt blocks the feed hole? Do you know the thread size? and i don know the history of this bike so god knows how long its been blocked



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TTRfan


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It's all in this thread Chris - http://ttr250.activeboard.com/t44874914/oil-cooler-information/ - you may have to scroll down a bit...

PS What did you find?????



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chrishughes1989


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top of feed hole is 14mm and length of the blanking bolt is 26mm stopping the flow passing into the filter housing (see pics sorry, not the best)



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TTRfan


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On the upside, that bolt is like unobtanium Chris!

Good that you have found the cause of the problem.



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chrishughes1989


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Here is a picture the bike its TDC And this is the cams, I think a tooth would be too much! What do you think?



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TTRfan


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The cam chain isn't a tooth out Chris, it's worn out cry



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chrishughes1989


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thanks my thoughts exactly, il order a new one and get it changed out. I am very lucky it ain't either snapped or the engine seized.



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