1978 Yamaha DT175 - Page 2

katoranger · 10-01-2012, 02:57 PM

I think we will be doing some assembly tonight. Might get a chance to try and start it.

If anyone has a frame that could donate a peg and mount for the right side that I can make fit.

FastDoc · 10-01-2012, 03:00 PM

Glad to hear about the progress!

SpudRider · 10-01-2012, 03:35 PM

Quote:

Originally Posted by FastDoc

Glad to hear about the progress!

X2.

Spud

katoranger · 10-02-2012, 10:02 AM

It runs. New carb. New throttle cable installed.

I don't know anything about the oil pump. Do they need to be bled? The oil tank was missing, but we replaced it and connected the line back up. It does not appear to be pumping, but I don't know if maybe it needs to be bled first.

Weldangrind · 10-02-2012, 10:26 AM

It probably does need to be bled. On Suzuki engines (with the MIC brand pump), there is one phillips screw that is simply present to allow oil to bleed from the tank. Once oil is pumping through the two lines, check valves prevent loss. One line routes to the left side main bearing and the other to the cylinder. That system can't be defeated easily.

The Yamaha system you're faced with differs because the oil is pumped out in one hose only, and it connects to a barb on the intake tube. Since Son of Weldangrind and I didn't trust the nasty old pump on our MX175, we plugged the barb, drilled out the main jet and ran premix. Much safer.

FastDoc · 10-02-2012, 11:37 AM

Look through Dan's website. He has a chapter on this with some useful diagrams. :idea:

katoranger · 10-02-2012, 09:06 PM

Looks like I have some good reading here. Let's learn something new tonight.

http://www.dansmc.com/2_stroke_oilpump.htm

FastDoc · 10-02-2012, 10:30 PM

Yup. That's the chapter I was refering to!

SpudRider · 10-03-2012, 01:00 AM

Quote:

Originally Posted by katoranger

Looks like I have some good reading here. Let's learn something new tonight.

http://www.dansmc.com/2_stroke_oilpump.htm

Always check first with my fellow Idahoan, Brother Dan.

Spud

FastDoc · 10-03-2012, 11:51 AM

I keep meaning to visit him when I'm up in the CDA area. Will have to arrange something.

10-01-2012, 02:57 PM	#1
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	I think we will be doing some assembly tonight. Might get a chance to try and start it. If anyone has a frame that could donate a peg and mount for the right side that I can make fit. __________________ You meet the nicest people on a Honda Clone.
	0

10-01-2012, 03:00 PM	#2
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Glad to hear about the progress! __________________ Happy to serve.
	0

10-02-2012, 10:02 AM	#4
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	It runs. New carb. New throttle cable installed. I don't know anything about the oil pump. Do they need to be bled? The oil tank was missing, but we replaced it and connected the line back up. It does not appear to be pumping, but I don't know if maybe it needs to be bled first. __________________ You meet the nicest people on a Honda Clone.
	0

10-02-2012, 10:26 AM	#5
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	It probably does need to be bled. On Suzuki engines (with the MIC brand pump), there is one phillips screw that is simply present to allow oil to bleed from the tank. Once oil is pumping through the two lines, check valves prevent loss. One line routes to the left side main bearing and the other to the cylinder. That system can't be defeated easily. The Yamaha system you're faced with differs because the oil is pumped out in one hose only, and it connects to a barb on the intake tube. Since Son of Weldangrind and I didn't trust the nasty old pump on our MX175, we plugged the barb, drilled out the main jet and ran premix. Much safer. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

10-02-2012, 11:37 AM	#6
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Look through Dan's website. He has a chapter on this with some useful diagrams. :idea: __________________ Happy to serve.
	0

10-02-2012, 09:06 PM	#7
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Looks like I have some good reading here. Let's learn something new tonight. http://www.dansmc.com/2_stroke_oilpump.htm __________________ You meet the nicest people on a Honda Clone.
	0

10-02-2012, 10:30 PM	#8
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Yup. That's the chapter I was refering to! __________________ Happy to serve.
	0

10-03-2012, 11:51 AM	#10
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I keep meaning to visit him when I'm up in the CDA area. Will have to arrange something. __________________ Happy to serve.
	0