Question about 2005 Honda CRF 250 R

2 Answers

Rebuilt top end and now wont start just backfires but all timing

I got the timing marks lined up and everything eles but it wont start it just backfires sometimes

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 101 Answers

Check your shims.prob got a valve open.

Posted on Jul 27, 2009

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 26 Answers

If you went by the manuals timing mark instructions you should be fine but i'd bet its still not in time. the lines on the cam should line up parrallel with the head casting, most times it looks like they are but its still one tooth off, i usuall put tensions the chain with my finger to see how parralell they are.. make sure the motor is in top dead center compression also. the manual is what shows your at tdcc.

Posted on Jul 12, 2009

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Yamaha Grizzly 600 backfires and doesn't want to idle


Did you line up the stator plate line with the notch on the cases? Sounds like your ignition timing is set a bit retarded. I would pull the side cover off and check the timing marks.

Sep 27, 2016 | Yamaha Motorcycles

1 Answer

I have jusy replaced the head gaskets on the motor but i cant seem to get in back in time ive tried to turn the disturbitor but its like it backfires what is the standard time line for this motor.


chain or belt
recheck timing marks on the cam and crank align
turn clockwise twice if the timing marks are out
it wont start and backfire

Apr 30, 2016 | Cars & Trucks

1 Answer

Backfiring


Sounds like the timing marks between the crank and camshaft are off. Turn the engine over manually until the crank pulley is at top dead center(TDC) remove the timing belt cover, and check to see if the camshaft marking (notch) is pointing at the proper mark, which I believe is aligned with the front side of the cylinder head on that model, but check the timing belt alignment specs to be sure.

Jun 06, 2013 | Cars & Trucks

1 Answer

2001 ford taurus, 3.0 vulcan motor. just rebuilt the whole motor, backfires out of the intake, seems to be out of firing order. i triple checked my work and can't find the problem. whistling sound of...


Back firing out of the intake is because the valves/cams are not set right. When you did the timing belt . did you set the crankshaft mark at top dead center of the compression stroke. If it's at the exhaust stroke this would cause backfiring and violent shaking.

May 22, 2011 | 2001 Ford Taurus

3 Answers

I replaced my cylinder head gasket.after putting everything together,i tried to start it but it won't.it cranks and backfires. i double checked everything and timed it several times by positioning the...


well try removing the distributor and spin it around half way 180 degrees then try. it seems you are off there are two ways to install the distributor because two turns for the crank equal one for the distributor.if still wont start call on me again i will help you .

Nov 14, 2010 | 1998 Chevrolet K1500

1 Answer

I'm helping a guy who rebuilt a 1983 sportster, th...


As strange as it sounds, the TDC mark on the crank has nothing to do with the cam timing on a Harley engine, neither the Sporty nor the Big Twin. Disregard the timing marks on the crank except for ignition timing.

To time the cams, start with the pinion gear. The timing marks on the gear and the end of the crankshaft must be aligned. Then install cam #1 and #3 so that their marks align with the marks on the #2 cam. The marks on the #2 cam must also align with marks on the pinion gear. So on the # 2 cam, you have three sets of marks that must align. Once you get these, align the #4 cam. The idler gear and generator gear do not have marks. On the '83 model, there is no timing marks on the oil pump either.

Now with the cams aligned, make sure you adjust your valves to zero backlash but you'll still be able to turn the pushrods with your fingers.

On the ignition timing, bring the front piston to TDC on the compression stroke. Now, bump the engine backwards until the piston is about half way down the bore. Check this using a common plastic drinking straw in the spark plug hole. Now, bump the engine in the direction of rotation until you see the first mark. This is the advance timing mark for the front cylinder. Continue to bump the engine in the direction of rotation. You may see another mark at the front cylinder retarded timing position. Then continue to bump the engine in the direction of rotation until you see the TDC mark and the piston is at TDC. Time you engine to the advanced front cylinder timing mark.

If you have anymore questions, contact me directly at wd4ity at bellsouth.net. I'll scan a picture for you.

Good Luck
Steve

May 15, 2010 | Motorcycles

1 Answer

Just put new timing kit on 95 gmc sonoma 2.2liter and lined marks up. truck still wont start. do i need to put number 1 cylinder on tdc before i start the truck. when trying to start it backfired a little.


click the ignition so #1 cylinder is at top dead center then pull youre distributer cap off make sure the rotor is pointing towards # 1 cylinder if not you re timing is 180 deg off pull the distributer out a little and turn the rotor to # 1 cyl you probaly dont have the timing marks lined up correct if the timing is off it will back fire either out the air filter or exhaulst ..

Nov 13, 2009 | 1995 GMC Sonoma

Not finding what you are looking for?
2005 Honda CRF 250 R Logo

Related Topics:

525 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4514 Answers

yadayada
yadayada

Level 3 Expert

75197 Answers

Gino Cussen
Gino Cussen

Level 2 Expert

216 Answers

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

Answer questions

Manuals & User Guides

Loading...