Question about Motorcycles

1 Answer

I have a 1973 rt 360 it starts fine and then runs wide open

Ive got a 1973 yamaha rt 360 new topend .50 over basseni pipe starts on first kick runs smooth for two minutes the surges wide open

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Motorcycles Master
  • 1,669 Answers

Sounds like a fuel regulation problem. If a carburator is involved check it for the float valve being stuck. If fuel injected, check the pressure regulator. Also check for possible air leaks in tubes leading to the engine...an air leak will cause abrupt revving.

Posted on Jan 11, 2013

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 3567 Answers

SOURCE: throtle open wide

It has been 35 years since I worked on a 360 as a mechanic at Lynn's Yamaha in D.M. Iowa. You have one of the few left alive. Pull the air cleaner off and look at the slide in the throat of the carb. Does it move all the way up and down freely when you twist the throttle? Is there play at the top of the adjuster on top of the carb? I think your bike has an oil pump for the 2 stroke oil. Remove the front right cover plate, (I think it had a right casing cover separate from the pump cover), and look at the operation of the cable wire on the pump. Both the slide and the oil pump cables should have some free play.

Are there reeds on your carb? The reeds will be between the carb and the cylinder if you have them. Are any of the reeds cracked or broken? Are all reeds fully closing? What condition is the rubber between carb and manifold? Get back to me with the information and we can go from there.

Posted on Jun 14, 2009

tellme2
  • 137 Answers

SOURCE: elecric start problem- kick start good

hi m8,, first try this, take the handle bar start button switch gear appart,,and clean the starter button terminals that connect wen u push button in,,spray some wd40 inside the switch gear wen u put it back together,,,,,often after off roading ,,connections that the eye cant see corrode wen the bike is washed down,, any probs still ,, shout and il anserw m8,,,,,cheers

Posted on Jan 11, 2009

  • 314 Answers

SOURCE: bike dont start. Yamaha 175 CT - 1973 make.

Firstlly have you a spark at the plug.if you have no spark then it may be your points or even the timing may be out .

Posted on Mar 13, 2010

  • 8 Answers

SOURCE: my 2002 yamaha ttr 225

well it is normal for a four strokes exhuast to turn red your not suppose to let them idle for long periods of time. and the running problem is probably the carb i would take it off and clean it before doing anything else could save you money i had the same problem on a yz450f i took the carb off and cleaned it and problem was solved and also run 93 octane gas if your not already

Posted on Mar 30, 2011

  • 3799 Answers

SOURCE: i have yamaha aerox and wont start

Have you been using 2 stroke oil in the oil tank? A lot of new riders haven't had this explained. A neighbour used engine oil and has now got to strip and refurbish the engine. A 2 stroke engine mixes oil with the petrol to lubricate the crank and con rod on the induction cycle. If you use engine oil, it carbonises in the engine due to the extremely high temperatures on the underside of the piston and aroud the bearing surfaces of the crank. It will run "ok" for a short while on this oil, but will eventually kill your engine. Also on 2 strokes the exhaust system needs regular cleaning to remove "coke" which is burnt oil in the form of a sludge. 2 strokes use exhaust tuning to improve performance and efficiency, so it may need a clean. This is the best advise I can offer with the information supplied, and also the most obvious. Just one other thing - when you turn the engine over do you get a spark? It could be the coil, if the rest is good. Sorry I can't be of more assistance, I hope this give you an idea of where to go from here.

Posted on Nov 23, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Yamaha rd 350 lc


Is it possible you have an exhaust valve stuck open or not seating properly? That would cause the fuel to run out of the combustion chamber and into the exhaust pipe, before the spark plug can ignite it. Just something to check out. Good luck to you.

Jun 18, 2014 | 1986 Yamaha RD 350

1 Answer

1973 Yamaha DT 360 oil leaking from compression release valve.


Hi, Dustin you may want to try tightening it for more information about your question and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Vintage Enduro Discussions Forums
Weird No Start Page 6 YamahaEnduro com
DOWNLOAD NOW Yamaha DT250 DT360 DT 250 360 Service Repair Workshop Manual...
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-dt

May 01, 2013 | 1973 Yamaha DT 360

1 Answer

Anyone have the wiring diagram for 1973 dt1 250 yamaha enduro ? mucho thanks.........


Hi, Tipalow for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $15 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
1973 yamaha dt250 wiring diagram Google Search
Yamaha Motorcycle Wiring Diagrams
DOWNLOAD NOW Yamaha DT250 DT360 DT 250 360 Service Repair Workshop Manual... $15
http://mybikemanuals.com/yamaha/yamaha-dt
OEM parts for Yamaha

Aug 29, 2011 | 1973 Yamaha DT 360

1 Answer

I HAVE JUST FOUND A 360 ENDURO. THE MOTOR # IS DT1F124237 & THE # ON THE FRAME IS RT113396. WHAT DO I EXACTLLY HAVE?


Could be you have a RT 360 frame, with a DT 360 motor in it. The RT was before the DT. Do some searching on the net for yamaha RT models.

Nov 20, 2010 | 1973 Yamaha DT 360

1 Answer

I need to know what the ingnition timing specs are for a 73 rt 360 with points ignition how many mm btdc?


Points gap should be .015 thousandths. The stock timing is 1.8mm btc. Race timing is 2.0mm btc.

Feb 09, 2010 | 1973 Yamaha DT 360

1 Answer

I have a fresh motor, new topend, starter gear?


Check the plug. I have had a very similar problem just recentley yesterday infact. It could be that you are running the oil mixture too rich as well...Good luck

Nov 02, 2009 | kawasaki KX 125 Motorcycles

2 Answers

I have a 1994 Yamaha 40 HP 3 cylinder 2 stroke engine starts and runs fine in neutral try to accelerate under load and it only will pull about 2800-3000 RPMs and wont go any faster it will rev fine in...


Reving in neutral does not mean the same thing as under load. If you need to pull 4500rpm under load and for an instant the load was gone, you would probably overrev to 6500. With the cover off and motor not running move the throttle to full forward. Look at your carbs and see if the throttle plates are wide open. If they are not all wide open take it back to the dealer. The throttle adjustment is off. You need the full range of travel from idle to topend.

Jun 25, 2009 | Light Outboard Motor Boat Bass Fishing...

1 Answer

Throtle open wide


It has been 35 years since I worked on a 360 as a mechanic at Lynn's Yamaha in D.M. Iowa. You have one of the few left alive. Pull the air cleaner off and look at the slide in the throat of the carb. Does it move all the way up and down freely when you twist the throttle? Is there play at the top of the adjuster on top of the carb? I think your bike has an oil pump for the 2 stroke oil. Remove the front right cover plate, (I think it had a right casing cover separate from the pump cover), and look at the operation of the cable wire on the pump. Both the slide and the oil pump cables should have some free play.

Are there reeds on your carb? The reeds will be between the carb and the cylinder if you have them. Are any of the reeds cracked or broken? Are all reeds fully closing? What condition is the rubber between carb and manifold? Get back to me with the information and we can go from there.

Jun 14, 2009 | 1973 Yamaha DT 360

1 Answer

Elecric start problem- kick start good


hi m8,, first try this, take the handle bar start button switch gear appart,,and clean the starter button terminals that connect wen u push button in,,spray some wd40 inside the switch gear wen u put it back together,,,,,often after off roading ,,connections that the eye cant see corrode wen the bike is washed down,, any probs still ,, shout and il anserw m8,,,,,cheers

Jan 08, 2009 | 2004 Yamaha WR 450 F

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

80 people viewed this question

Ask a Question

Usually answered in minutes!

Top Motorcycles Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers

yadayada
yadayada

Level 3 Expert

76649 Answers

kakima

Level 3 Expert

102366 Answers

Are you a Motorcycle Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...