Author Topic: Yamaha DT 175  (Read 858 times)

0 Members and 1 Guest are viewing this topic.

Offline John

  • Street Cruiser
  • ****
  • Posts: 886
  • AREA: Southeast Area
  • COG#: 4157
  • Membership Level: Web Master
Yamaha DT 175
« on: October 21, 2010, 12:27:52 am »
Folks:

I have a friends DT-175 here for a rpm problem, it won't go above 5k rpm.  I've totally rebuilt the carb, now it will go to 6500 before it stalls.  Made way too many adjustments to the carbs settings, no significant change in the problem.  Anyone else got an idea?  Looking into the ignition next, then the exhaust.  I do know that the old DT250 I had many, many, years ago had a sweet spot on its timing, so I hope that will solve it.  All others who dare, please do reply.  Yes, this has gotten to me, one more seemingly simple problem that as of yet is not taken care of.
tcars
John
COG 4157, AMA 390409, ROK Charter Member
SE Newsletter Editor

Offline smithr1

  • I Need a Life
  • ******
  • Posts: 5202
  • AREA: South Central Area
  • COG#: 6197
  • Membership Level: Asst. Area Director
Re: Yamaha DT 175
« Reply #1 on: October 26, 2010, 06:37:41 pm »
Mice made a home in the intake or exhaust?
---
Bob Smith (smithr)
Austin, Texas baby!
2010 Kawasaki Concours, Midnight Blue
COG 6197, CDA 107

Offline 2linby

  • Iron Butt
  • *****
  • Posts: 3711
  • I rode today, did you?
  • AREA: Northwest Area
  • COG#: 5539
  • Membership Level: Active
Re: Yamaha DT 175
« Reply #2 on: October 26, 2010, 07:46:36 pm »
Folks:

I have a friends DT-175 here for a rpm problem, it won't go above 5k rpm.  I've totally rebuilt the carb, now it will go to 6500 before it stalls.  Made way too many adjustments to the carbs settings, no significant change in the problem.  Anyone else got an idea?  Looking into the ignition next, then the exhaust.  I do know that the old DT250 I had many, many, years ago had a sweet spot on its timing, so I hope that will solve it.  All others who dare, please do reply.  Yes, this has gotten to me, one more seemingly simple problem that as of yet is not taken care of.

Have you tried manually turning the carbeuator throttle cable wheel by hand?  If the cable is not adjusted properly, or the wrong one, or perhaps there is a limiter placed on it for whatever reason, you are not fully openning up the carb WOT.  Just a thought.  Also make sure there is no air blockage and the gas line is not crimped or restricted in anyway, this includes the petcock as well.  Best of luck!
"2linby" Get it? "Tooling by" "Everything is simple, but nothing is easy".
Ex NWAD, AAD, COG #5539, IBA #15034 TEAM OREGON MC Instructor, Mentor 2001 Sonic Blue  166K and counting!
http://tinyurl.com/njas8 (IBA BBG)
http://tinyurl.com/lwelx (Alaska trip

Offline BJ_CT

  • Street Cruiser
  • ****
  • Posts: 745
  • AREA: Northeast Area
  • COG#: 9058
  • Membership Level: Active
Re: Yamaha DT 175
« Reply #3 on: October 26, 2010, 11:18:08 pm »
It's either running out of air, gas or spark. Can easily imagine clogged petcock.