NSR250.net Forums Logo: Honda NSR 250 Forums, Classifieds and Service Manual in English. Covering All Honda NSR 250 MC16, MC18, MC21 and MC28 models
NSR250.net Forums

#
 
#
 
Performance Engineering

  • NSR250 Forums Index ‹ NSR250R Discussion
  • Members Content
  • Members Garage
  • Subscription
  • Transactions
  • FAQ
  • Search
  • Register
  • Log in

1993 NSR250R MC21, hard starting?


Reply to topic   printer-friendly view
Page 1 of 2  Goto page 1, 2  Next Download Topic





Twilight

 
Posts: 16
Joined: 09 Aug 2009

Location: Washington
    Send private message View user's profile AIM Address
    Reply with quote  

1993 NSR250R MC21, hard starting?

Wed Dec 09, 2009 8:54 pm » Post: #1 » Download Post

Okay Ive had it since last September but I am now sick of the kickstart. It usually takes anywhere from 10-20 kicks to start the thing! Compression is around 180psi in each cylinder, plugs show good color with a tan tip and slightly darker around the edges;



All stock machine, no wire splices or modifications. New gas and Honda HP2 oil in the 2 stroke oil tank... what could be causing this? Spark is strong with a blue and white color emitting from the plug.
Back to top


Dave Ett
Site Moderator
Site Moderator
 
Posts: 3648
Joined: 20 Feb 2004

Location: Gloucestershire, England
    Send private message View user's profile
    Reply with quote  

Wed Dec 09, 2009 11:00 pm » Post: #2 » Download Post

How many miles?
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Back to top


cgallant
Site Admin
 
Posts: 1608
Joined: 18 Jan 2004

Location: Ocala, FL
2001 Honda RS250
    Send private message View user's profile Visit poster's website
    Reply with quote  

Wed Dec 09, 2009 11:44 pm » Post: #3 » Download Post

compression seems to be good. Is that 180 on both cylinders?

Have you pulled the carbs apart and made sure the engine is getting enough fuel?

You can pull the plugs, put a small amount of pre-mix into each cylinder, replace the plugs and try to start it again.

if it starts easier, it's the carbs. if it doesn't then check the ignition system.
Back to top


Twilight

 
Posts: 16
Joined: 09 Aug 2009

Location: Washington
    Send private message View user's profile AIM Address
    Reply with quote  

Wed Dec 09, 2009 11:53 pm » Post: #4 » Download Post

compression seems to be good. Is that 180 on both cylinders?

Have you pulled the carbs apart and made sure the engine is getting enough fuel?

You can pull the plugs, put a small amount of pre-mix into each cylinder, replace the plugs and try to start it again.

if it starts easier, it's the carbs. if it doesn't then check the ignition system.


Yes, 180psi in top cylinder and 183psi in the bottom cylinder. Tried pre-mix in the summer when I was doing my intial tear down and clean, it did start easier that way, but was only that way.

The bike has about 5800 miles on it, or 9400 kilometers.

Ive worked on and owned 2 strokes my whole life, but due to almost all parts for the NSR being on the other side of the world from the USA, I didnt want to start going into the internals without a good cause.
Back to top


Hermit

 
Posts: 588
Joined: 08 Jun 2005

Location: Paraparaumu, New Zealand
1992 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Thu Dec 10, 2009 5:16 am » Post: #5 » Download Post

wouldn't difficult starting indicate an air leak? Perished crank seals perhaps? If its only done 5800 miles over its whole lifetime it may have been sat in storage for a long time which would've upset the crank seals. Including the centre one.

If the other suggestions don't yeild results you should put together a leak down testing kit to check for air leaks.

If you do a forum search you'll be able to find photos and details of the kit i made up for testing my engine.
_________________
After years of moaning about immigrants now i am one...
Back to top


Twilight

 
Posts: 16
Joined: 09 Aug 2009

Location: Washington
    Send private message View user's profile AIM Address
    Reply with quote  

Thu Dec 10, 2009 5:33 am » Post: #6 » Download Post

Held 7psi in both cylinders for 4 hours... It has sat in storage but was always ran every 3-5 months from what I was told.

Leakdown test was done before I bought the machine... Too many 2 strokes in my life to know what not to buy.

Thanks all! I'll be starting on everything when it warms up... 20-30s too cold for riding.

My NSR will be on display at the Seattle bike show.
Back to top


Kubira

 
Posts: 200
Joined: 24 Mar 2009

Location: Adelaide, Australia
1992 Honda MC21SE
    Send private message View user's profile Send e-mail
    Reply with quote  

Thu Dec 10, 2009 11:16 am » Post: #7 » Download Post

Just on spark plugs, ive found the plugs for nsr's to be a lil dicky. What i mean is, im used to, and its sort of common knowledge that a spark plug should be finger tightened, then just nipped up a lil bit.

However it seems that with these suckers, they need to be tightened up nice, and lets just say, a lil bit more than "nipped up" to get a good, solid seal
_________________

Back to top


bushman
Supporter - Titanium
Supporter - Titanium
 
Posts: 650
Joined: 22 Aug 2006

Location: Espaņa
1991 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Thu Dec 10, 2009 12:04 pm » Post: #8 » Download Post

Battery condition?
Back to top


cgallant
Site Admin
 
Posts: 1608
Joined: 18 Jan 2004

Location: Ocala, FL
2001 Honda RS250
    Send private message View user's profile Visit poster's website
    Reply with quote  

Thu Dec 10, 2009 2:36 pm » Post: #9 » Download Post

Kubira wrote:Just on spark plugs, ive found the plugs for nsr's to be a lil dicky. What i mean is, im used to, and its sort of common knowledge that a spark plug should be finger tightened, then just nipped up a lil bit.

However it seems that with these suckers, they need to be tightened up nice, and lets just say, a lil bit more than "nipped up" to get a good, solid seal


standard installation procedure for plugs with proper torque has always worked for me on my NSR's.

The battery is always a good place to check as well, and is part of the ignition system trouble shooting process. These bikes require a good condition, full charged battery to start properly.
_________________
Charles Gallant
Back to top


Canuck13

 
Posts: 347
Joined: 12 Feb 2007

Location: Melbourne, Aus
    Send private message View user's profile
    Reply with quote  

Thu Dec 10, 2009 11:08 pm » Post: #10 » Download Post

As Charles said. I find that if mine doesn't start within 5-6 kicks, its time to pull the battery and give it a charge. It then usually starts with the 5-6 kicks. Usually only happens when the bike has been sitting for a bit.
Back to top


Twilight

 
Posts: 16
Joined: 09 Aug 2009

Location: Washington
    Send private message View user's profile AIM Address
    Reply with quote  

Fri Dec 11, 2009 2:13 am » Post: #11 » Download Post

Whoa!? It has a battery! Jeeze talk about being a bloomin stick, I didnt even realize that!.

I need a manual for this bike.
Back to top


Canuck13

 
Posts: 347
Joined: 12 Feb 2007

Location: Melbourne, Aus
    Send private message View user's profile
    Reply with quote  

Fri Dec 11, 2009 3:03 am » Post: #12 » Download Post

pmsl, talk to Charles, he has a great one for the MC28, but a lot of it can be dragged across to the 21.
Back to top


wormser77

 
Posts: 22
Joined: 06 Sep 2007

Location: washington state
    Send private message View user's profile
    Reply with quote  

Fri Dec 11, 2009 7:03 pm » Post: #13 » Download Post

Nice to see another nsr in washington Cool
What part are you from? I'm over spokane in the land of the freezing lol
_________________
ring ding ding
Back to top


Turn 1

 
Posts: 8
Joined: 06 Sep 2007

Location: Seattle
    Send private message View user's profile
    Reply with quote  

Fri Dec 11, 2009 8:03 pm » Post: #14 » Download Post

I know mine takes more than a few kicks to start when it has not been run in a while. Makes sense to me the fuel in the bowls has lost its mojo and as you kick and kick and kick you eventually get enough fresh gas to start it.

Peter
Back to top


Dave Ett
Site Moderator
Site Moderator
 
Posts: 3648
Joined: 20 Feb 2004

Location: Gloucestershire, England
    Send private message View user's profile
    Reply with quote  

Fri Dec 11, 2009 10:41 pm » Post: #15 » Download Post

Mine takes a hundred, or a push start. Ask martin Fitzgibbons. Embarassed
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Back to top


Reply to topic   printer-friendly view
Page 1 of 2  Goto page 1, 2  Next Download Topic

NSR250R Discussion

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

  • NSR250 Forums Index
  • All times are GMT
Powered by phpBB © 2001, 2005 phpBB Group


Hosted by NSR250dotNET © 2008 NSR250dotNET