Question about 2005 Honda CRF 450 R

2 Answers

Problem starting every time i try to start the bike it back fires i just got the bike but not sure what it would be

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

Sounds more like a slipped timing chain to me, big problem area on the big power 4-strokes, tokyo mods makes a manual timing adjuster, will make a big difference in longevity of your next timing chain, i wound also check the vaves to make sure the piston hasn't shaken hands with the valves

Posted on Feb 19, 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
  • 28 Answers

Its the carb its out of adjustment once this is fixed so will your problem be fixed

Posted on Dec 28, 2008

  • tilesetter_4 Dec 28, 2008

    thats why it backfires

×

2 Suggested Answers

Benimur
  • 6966 Answers

SOURCE: bike keeps back fireing when first starting

Hi and welcome to FixYa,

Initially, backfiring is a spark/timing issue or contaminated fuel (water) or as you stated stale fuel. AVGas would not result to backfiring but rather a stronger pull though would heat up easily.

Good luck and Thank you for using FixYa. Happy Holidays.

Pls be informed that due to my current rank and rating, even a Helpful would be detrimental to my status. Should this solution not address your concern, it would be appreciated if you could just not rate it at all. Cheers.

Posted on Dec 25, 2008

  • 1 Answer

SOURCE: hard to start back fires

try checking the hotstart lever. mine would get stuck and had almost same symptoms.
cre 450 f

Posted on Aug 22, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Cranks no start or fire add gas down throat of carbs and it back fires out pipes and carbs


bikes that sit for long periods of time need there points or electronics pick-ups serviced , rust and aluminum corrosion happens over time on these

miss fires are sure signs of this to mean out of time

and yes the carbs/tank will need a total cleaning out too

Sep 17, 2015 | GAS Motorcycles

1 Answer

Backfiring and trouble starting


If you change the exhaust pipes, you have to sync the carbs (if you cant sync them, you have to change the carb jets), usually it is backfiring because the carbs are not in balance.

May 18, 2013 | 1996 Honda VT 600 C Shadow

2 Answers

96 bandit, wont start,will turn over but not fire up, have changed plugs, drained carbies, checked for spark, still not firing up, any ideas?


check fuel filter and shut off in float chamber , if you have spark and gas , still not firing check timing .

Mar 18, 2012 | 1996 Suzuki GSF 600 S Bandit

1 Answer

This is a 1984 1200 that will not start and back fires thru the exhaust and carbs


hello
Back fire is an indication that the bike is firing incorrectly.
Your timing chain is probably stretched, due to the year.
inproper valve timing due to stretched timing chain will make the bike backfire.

I have other thoughts like stuck valves or inproper sparkplug wires on wrong plug,
i always start with easier and less expensive method.
1st check your sparkplug wires to make sure they are on the right plug.
2nd pull sparkplugs and do compression and leakdown test.
3rd pull componets to see if valves are opening and closing, (valve clearance check)
4th if valves are good, then timing chain is probably stretched.
5th if timing chain and timing marks are good, and valves are good, then proceed to
testing the signal generator to make sure your getting a signal to the cdi,
6th if you have a signal to cdi, the cdi tells which coil to fire. either # 1&4 or # 2&3.
if signal generator is working, but coils aren't firing right then its the cdi.
obviously your coils work because its firing, just back firing.

Thats all it could be from easiest to hardest.
Good luck and have a great weekend.
Big Al

May 21, 2011 | 1987 Honda GL 1200 Aspencade Gold Wing

1 Answer

Suzuki bandit 1996 will not start


If you have spark and still the bike is not starting ( and the timing on the spark is correct) make sure you got fuel flowing to the engine, if fuel is getting there and still the engine doesn't start, check the cylinder head and pistons and make sure you got compression. These are the problems that can cause a bike not starting. Hope it helps

Mar 05, 2010 | 1996 Suzuki GSF 600 S Bandit

1 Answer

1989 yahama fzr wont start


could be the diode. They will read in one direction only coils sound ok

Jul 26, 2009 | Yamaha XS 650 H Motorcycles

2 Answers

Dirt bike thats hard to start..


needle and seat are worn out in carb, to much fuel is flooding cylinder. remove carb, clean, get new needle and seat, set float. problem goes away. pull your plug after kicking. its probably wet.
When you push, or pull start you evacuate excessive fuel, when engine is warm, easier to start extra fuel burns easier.

Mar 15, 2009 | Yamaha YZ 250 Motorcycles

2 Answers

Bike cranks and wont start


Hi .... Sounds like regulator/rectifier is defective. Fully charge battery and try starting again, place multi-meter across battery and it should show 12.8-14 volts. If it doesn't replace reg/rec unit.

Jan 04, 2009 | 2000 Harley Davidson FLHTCUI Electra Glide...

2 Answers

My bike will not start!


I've had the same problem a couple of times now The fly wheel is located using a 3mm key
which is way to small that shears off putting the timing out causing back firing and not starting.
Mine did it again last weekend so i'm on the search to cure it once and forall.

Dec 01, 2008 | 1994 kawasaki ZZR 400

Not finding what you are looking for?
2005 Honda CRF 450 R Logo

217 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4477 Answers

yadayada
yadayada

Level 3 Expert

61037 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...