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1963 99 Dominator Breather

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Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Permalink

Previously wrote:

Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Hi Tony It depens if your tank as a tower or not If it As then it og there if not a pipe runs to the chain guard and fixs there to oil the chain , hope this helps yours Anna J Dixon

Permalink

Previously wrote:

Previously wrote:

Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Hi Tony It depens if your tank as a tower or not If it As then it og there if not a pipe runs to the chain guard and fixs there to oil the chain , hope this helps yours Anna J Dixon

Anna,

Thanks for your reply, the oil tank is standard on the right hand side of the bike, it has a breather pipe running from a connection on top of the tank down to the bottom of the bike just near the center stand, at the connection on the top of the tank is another stub pipe with nothing on, I feel this could connect to the crankcase breather but am concerned that without some kind of trap the pipe with oil inside could restrict the breathing of the engine.

I wonder what the original set up was??

Tony

Permalink

Previously wrote:

Previously wrote:

Previously wrote:

Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Hi Tony It depens if your tank as a tower or not If it As then it og there if not a pipe runs to the chain guard and fixs there to oil the chain , hope this helps yours Anna J Dixon

Anna is the expert here for sure. but i might add:i have a 61 650, it has the same pipe exiting the back. i use it in my 62 Atlas and vent it into the oil tank as described, no problem. I dont think it matters if the vent is at the front or back of the engine they both go into the oil tank.

Anna,

Thanks for your reply, the oil tank is standard on the right hand side of the bike, it has a breather pipe running from a connection on top of the tank down to the bottom of the bike just near the center stand, at the connection on the top of the tank is another stub pipe with nothing on, I feel this could connect to the crankcase breather but am concerned that without some kind of trap the pipe with oil inside could restrict the breathing of the engine.

I wonder what the original set up was??

Tony

Permalink

Previously wrote:

Previously wrote:

Previously wrote:

Previously wrote:

Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Hi Tony It depens if your tank as a tower or not If it As then it og there if not a pipe runs to the chain guard and fixs there to oil the chain , hope this helps yours Anna J Dixon

Anna is the expert here for sure. but i might add:i have a 61 650, it has the same pipe exiting the back. i use it in my 62 Atlas and vent it into the oil tank as described, no problem. I dont think it matters if the vent is at the front or back of the engine they both go into the oil tank.

Anna,

Thanks for your reply, the oil tank is standard on the right hand side of the bike, it has a breather pipe running from a connection on top of the tank down to the bottom of the bike just near the center stand, at the connection on the top of the tank is another stub pipe with nothing on, I feel this could connect to the crankcase breather but am concerned that without some kind of trap the pipe with oil inside could restrict the breathing of the engine.

I wonder what the original set up was??

Tony

Steven,

Thank you for your advice.

I am in the process of fitting a regulator in place of the rectifier, with the tool tray out I noticed that the chain guard at the drive endhas a hole the same size as the breather from the oil tank, so that is where I am going to route the tank breather.

The crankcase breather is another matter, normally an engine breather should not have any restriction so I am uneasy with it going into the tank, further investigation required.

Many thanks for all advice provided.

Tony

Permalink

Previously wrote:

Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Your model originally would have had the short breather pipe aimed at lubricating the rear chain.Later models had a modified oil tank to accept a pipe connecting to the filler tube of the oil tank.Of course yours could have been modified or even a later tank fitted.If I was you I would leave it as it is,the later version did not oil the chain so well.

Regards Ron

Permalink

Previously wrote:

Previously wrote:

Currently the breather is just a short copper pipe on the rear of the drive side crankcase, Ithink it should be connected to the spareconnection on the top of the oil tank breather. My question is; is this the original set up, does it let the engine breathand is there an alternative arrangement.

Thanks in advance for any advice.

Tony

Your model originally would have had the short breather pipe aimed at lubricating the rear chain.Later models had a modified oil tank to accept a pipe connecting to the filler tube of the oil tank.Of course yours could have been modified or even a later tank fitted.If I was you I would leave it as it is,the later version did not oil the chain so well.

Regards Ron

Permalink

Dear Anthony,

It is all very simple: there is a breather pipe that exits the engine crankcase by the end of thecamshaft. Connect that with some plastic tubing to one of the open stubs on the oil tank top. From the other stub on the oil tank connect that with the same sort of plastic pipe to the small protruding pipe on the chainguard.My 650ss has had this arrangement on it since restoration in 1976 andI haven't even changed the plastic pipe although I acknowledge it might be a bit hard now.

Heat the plastic pipe in boiling water and simply push it over the connections - don't bother jubilee clipping it. If you think this isinadequate then a cable tie pulled over each joint will make it bombproof.

Regards,

Peter Bolton

Permalink

Previously wrote:

Dear Anthony,

It is all very simple: there is a breather pipe that exits the engine crankcase by the end of thecamshaft. Connect that with some plastic tubing to one of the open stubs on the oil tank top. From the other stub on the oil tank connect that with the same sort of plastic pipe to the small protruding pipe on the chainguard.My 650ss has had this arrangement on it since restoration in 1976 andI haven't even changed the plastic pipe although I acknowledge it might be a bit hard now.

Heat the plastic pipe in boiling water and simply push it over the connections - don't bother jubilee clipping it. If you think this isinadequate then a cable tie pulled over each joint will make it bombproof.

Regards,

Peter Bolton

Peter,

Many thanks, this was whatI was really looking for, someone who had set up the crankcase breather as I thought it should be and had not had any issues since.

Thanks again for your advice.

Regards

Tony

 


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