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I just put new sparkplug in my 1977 yamaha chappy and i cant start it

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  • 13 Answers

Are you using the correct plug for the bike? You don't say much, was it going before you changed the plug? A bit more information would assist

Posted on Feb 09, 2014

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Posted on Jan 02, 2017

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SOURCE: I just put a new battery in my 1977 yamaha 650 .

It takes a 12 volt YB14L-A2 battery, which is large by modern *** motorcycle standards. There should be a 20 amp in -line fuse on the the small wire attached to the main battery positive wire. Blacked? Is that computer geek terminology?

Posted on Feb 16, 2010

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HELLO, I HAVE A 1975 YAMAHA CHAPPY LB 80. IT DIDN'T HAVE A CARB ON IT I PURCHASED ONE FROM ZOOM ZOOM, INSTALLED IT. IDLES GREAT WHEN I PUT A LOAD AND THROTTLE IT; IT BOGGS DOWN. ANY ANSWERS WO


Sounds like you received a "compatible" carb, correct body casting but jets and/or air bleeds need changed. Similar to if you ordered a carb for a sb chevy, would need tuned to your specific application.

Feb 01, 2015 | Yamaha Motorcycles

1 Answer

I have a 77rd400 and the left cylinder is missing and after running it for a couple of minutes the right cylinder gets hot but the one that is missing doesn' get hot at all. Thanks Eric


Hi,there is a fuw resons for this,most likely is that there is no spark,so first of all take the spark plug out of the sparkpluge hole put it back in the h,t,lead and put the electrode of the sparkplug nexst to the engine and kick it over to see if there is a good spark,(I would say that there isnt a spark)if not,then I he would say that the nexst step is to take off the round cover off on the left hand side if you are sitting on the bike,I think 3 or 4 screws or alan key bolts if they have bean replaced,now again put ignision on and try kicking it over to see if there is a spark,(some had electronic egnition,some had pionts and condenser)if you get a spark on 1 set of pionts and not the other,replace bothe pionts and condensers,if you have a spark on bothe the pionts then its iver the coil or h,t,lead braking down,(sorry I forgot to mention if there is a spark when first testing the sparkplug,then its iver a blocked jet in the carb,and if not a blocked jet then you would have to give it a conpression test to see if there is eney internal damage),I would put my money on the spark,well I hope this was some help to you,all the best hope you sort it.

Jun 29, 2014 | 1986 Yamaha RD 350

2 Answers

1977 yz 250 isn't getting fire


Check the points for proper gap and clean. The old school bikes used more than just coil and plugs. Also, often overlooked, check the kill switch connection. Often this is the case on Yamahas.

Apr 15, 2013 | 2003 Yamaha YZ 250

1 Answer

Bike bogs and back fired when i gear. not in nuteral though


Hi, Put new sparkplugs in and then see how it runs. My guess is that you have a bad plug(s). Good luck.

Aug 19, 2012 | 1994 Yamaha FZR 1000

1 Answer

My yz 125 made a loud popping noise when i tried to kick it up now it wont start any suggestions


Try putting a new sparkplug in could be fouled out. loud pop was just a back fire.

May 17, 2011 | Yamaha Motorcycles

1 Answer

1977 Yamaha yz400 specs


Hi, Rpm1mil 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 zero $0 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.
Yamaha DT 400 1977
Yamaha IT 490
Yamaha YZ400FL Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Mar 27, 2011 | Yamaha Motorcycles

1 Answer

1977 Yamaha TY 250 wiring diagram


Hi, Lizandgeof 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 zero $0 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.
1977 Yamaha TY 250 wiring diagram Google Search
Yamaha Motorcycle Wiring Diagrams
Service Manual TY250 TY350
OEM parts for Yamaha
1975 1977 YAMAHA TY250 amp TRIALS Factory Owner Service Repair Manual CD... $8 cheap

Mar 01, 2011 | Yamaha Motorcycles

2 Answers

I just put a new battery in my 1977 yamaha 650 .


You could've blown a fuse, could be a dead short somewhere, could be a faulty battery, could be......

Jul 12, 2009 | 1974 Yamaha XS 650 A

2 Answers

Im trying to find out what yamaha i have i know its a 250 registared 1977 looks like a scrambler i wish to sell it and am not sure wat its worth its not an rd350 i had to put that in model description


If it has lights, etc. it is most likely a DT250. If not it is likely an IT250
Google 1977 DT250 and look in the images to see if it matches your bike.

Jun 27, 2009 | Yamaha RD 250 Motorcycles

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