20 Most Recent 2008 Honda CRF 450 R Questions & Answers


Hi, Tomneave for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, 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 for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://www.proride.com/smfforum/index.php?topic=74183.0
09 12 Honda CRF450R Valve Clearance Adjustment Do it RIGHT
Honda CRF450X 2005 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda 450X 2005 Owner Manual Competition Handbook

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


2008 Honda CRF... | Answered on Jan 14, 2018


Hi, Anonymous you're getting ready to go riding you pull out the dipstick to check your oil level and are greeted with the unmistakable smell of gasoline. What happens next depends on the following:
1. You have experienced this before and do not start the engine but do change your oil and filter leaving it 1 quart low until the engine reaches operating temperature then top off as necessary.
2. The amount of time your bike has been sitting since the last time the engine was running.
3. The amount of gas and contaminants in the tank.
4. The oil pump location, exterior or interior.
5. The condition of your petcock gasket/seal/diaphragm.
If your gas tank was low and you start the engine probably nothing you would notice but if your gas tank was full and you start your engine the oil/gas mixture can blow into your air filter, come streaming out of your crankcase breather hose, and launch your oil tank cap followed by a blast of oil. The mess can be minor or you need to call a Hazmat team for assistance. This will also happen if you overfill your oil tank.
Next is the how and why gas can get into your oil tank/system:
a. The vacuum petcock rubber/diaphragm fails, which allows gas to flow from the fuel tank through the petcock, through the vacuum line into the intake manifold, then into the combustion chamber, where it seeps past the piston rings and into the bottom end.
3. Nonvacuum petcocks that are not turned to the off position will patiently wait until contaminants from the gas tank build up in between the carburetor needle and seat breaking the seal thus inviting gas to enter the combustion chamber eventually finding it's way into the bottom end and the oil tank.
4. Bottom line if you're not going to ride your bike for a while turn off the petcock.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
ASK THE MXPERTS CAN GASOLINE GET INTO THE CRANKCASE OF HONDA CRF450 Anyone with gas in oil 2013 Honda CRF450R
Honda CRF450X 2005 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CRF450R Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

2008 Honda CRF... | Answered on Dec 13, 2017


Hi, Kevinedwa376 for this scenario you will need your service/owners manual if you can't find the best tool you ever bought for your Honda, 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.
16t front sprocket on CRF450
How to take off CRF450 front sprocket
Honda CRF450X 2005 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CRF450R Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


2008 Honda CRF... | Answered on Jun 27, 2017


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
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.
https://crfsonly.com/forum/viewtopic.php?t=36689
How to fix No Spark Problem on Motorcycles and Dirt Bikes
Honda CRF450X 2005 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CRF450R Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


2008 Honda CRF... | Answered on Jun 26, 2017


Is the air filter clean or no air leaks in the manifolds intake or the jets or carby haven't been damage when cleaning it or is there fuel flowing into the carby maybe fuel filter can on try

2008 Honda CRF... | Answered on Dec 30, 2013


check out put of generater , coil etc ! P...

2008 Honda CRF... | Answered on Dec 29, 2013


could be more than likely water pump seals.

2008 Honda CRF... | Answered on Nov 26, 2013


Damage to the spark plug is surely related and caused by a more specific problem , if you could repost a new question with a bit more details on your Honda is running what fuel or mixture your using and exactly which spark plug you are using, or better a photo or video of this burned up plug we could help more.
669181b7-98b2-48c1-9a25-cb0097c06f35-lwjts5badjg22dvdzvh5gb3f-3-0.jpeg Would you say you are experiencing any of these scenarios https://e3sparkplugs.com/blog/are-your-spark-plugs-trying-to-tell-you-something/
https://www.6ya.com/jacobsmith

1c8c3d8a-0678-41e5-a36e-9ede9bf9b38b-lwjts5badjg22dvdzvh5gb3f-3-2.jpeg

Honda CRF 450 R... | Answered on May 02, 2019


Hi, Anonymous "ABSOLUTELY" for more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
CRF450 head
Decking the head
Honda CRF450X 2005 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CRF450R Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Honda CRF 450 R... | Answered on Jun 26, 2017


Hi, Taylor_gibso and the usual suspects are:
1. Clutch not adjusted properly.
2. Primary chaincase overfilled with lubricant.
3. Corners wore off shifter clutch dogs.
4. Shifter return spring bent or broken.
5. Bent shifter rod.
6. A loose shift lever on shifter shaft.
7. Shifter forks sprung.
8. Shifter pawl needs adjusting.
9. Heel/toe shifter coming in contact with the floorboard.
10. Transmission oil too heavy.
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.
shifting hard
https://www.crfsonly.com/forum/viewtopic.php?f=2&t=23448
Honda CRF450X 2005 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CRF450R Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Honda CRF 450 R... | Answered on Jun 26, 2017


Fifty something I'm nearly sure...

Honda CRF 450 R... | Answered on Oct 12, 2014


Check if water pump shaft isn't bent

Honda CRF 450 R... | Answered on Dec 30, 2013


Check cylinder compression

Honda CRF 450 R... | Answered on Dec 30, 2013


Yes, you can do this, but this won't resolve the stretching problem.
Actually the tread is gone in the alumni cylinder, you can try a longer bolt, if you have enough room for this. You can buy a tread repair insert and fix the tread.

Honda CRF 450 R... | Answered on Mar 21, 2013


have you checked the kill switch? It may be stuck activated.

Honda CRF 450 R... | Answered on Jan 13, 2012


Here are images from the service manual. There is more to the installation ; cam mount torque and valve timing for example. My email is tombones49@gmail.com. Email me and I will try to email back with a PDF attachment of the head installation chapter from the factory service manual. tombones49_233.gif

Honda CRF 450 R... | Answered on Aug 14, 2011


Have you tried another spark plug. It is easy to wet foul a new plug with ethanol fuel. New spark plugs need to be driven a few miles before there is a enough exhaust carbon to seal the crack between the metal body and the insulator. It is also possible that the resister in your spark plug cap has burned out causing a weak spark or no spark at idle.The spark plug cap is part #2 on the following diagram. http://www.bikebandit.com/houseofmotorcycles/2009-honda-crf450r/o/m18024#sch583897 The OEM spark plug cap is $35 but you may be able to use an NGK replacement for around $5.The spark plug cap simply unscrews off of the end of the wire and should read 5000 OHM's on a voltage meter. If the reading is higher or lower replace the cap.

Honda CRF 450 R... | Answered on Jul 23, 2011


No, it's not necessary.

Honda CRF 450 R... | Answered on Jul 06, 2011

Not finding what you are looking for?
2008 Honda CRF 450 R Logo

9 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

5968 Answers

Marvin
Marvin

Level 3 Expert

85216 Answers

richard libby

Level 2 Expert

209 Answers

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

Answer questions

Manuals & User Guides

View Most Popular

CRF 450 R Honda

  • CRF 450 R Honda

Most Popular Question

valve clearances

  • Motorcycles
Loading...