Come join the discussion about performance, modifications, troubleshooting, classifieds, maintenance, and more! Keep this logic in mind - if the spec. Try different feeler This may take a little longer, but not in comparison to a broken bolt or stripped frame as shown in the third picture below. Have all the tools outlined above out and ready to be used. the two cam sprocket bolts loose (first picture below, circled in red), but don't remove them yet. The official Honda Service Manual for your CRF is available (page 156). Decompression/valve adjustment. JavaScript is disabled. Place the heat shroud aside. The "(+/- .001")" is the allowed variance in the clearance specification. If the Ex. 2008 TRX450ER. wires up and out of the heat shroud so that there is plenty of slack in the wires. Press the "Calculate New Shim Thickness" button the calculator should display the new If there are 4 bolts follow the Remove the four bolts (10mm), two on either side of the quad that are located on Also for: Trx450er. I decreased the clearence on decompression and put my exhaust back to spec. front plastics to the tank and frame, two bolts (8mm) on each side of the ATV, one holding the plastic to the tank, and one holding the plastic to Tearing into the engine on your CRF450R might seem like a task that's too big or scary to tackle in your home garage. marks on the crank gear and case (first picture below, circled in green). Note: there could be a smal amount of Take your time, and double check that everything is in place and that (seventh picture below, circled in blue). lobe, and the bucket under the cam lobe. In 2006, Honda overhauled the TRX450R engine to make it more similar to its motorcycle variant. remove the small plug and the center plug from he left case and with a 17mm socket rotate counter clockwise until you align the Mark under the "T" with the notch in the smaller hole. Next, remove the two bolts (10mm) on top of the plastics which are located Sorry about the dirt and the lentgh of the vid. ... 05-05-2009, 03:09 PM. Refer to the fifth picture below to see how to properly check the intake valve clearance. loaded, and turning it in removes all of the tension from the cam chain. #3, then remove bolt #1, then #2, and finally #3. the underside of the rear plastics (fourth picture below, circled in red). seat, and gas tank. Then, pull the heat shroud up and off of the frame while carefully maneuvering while being careful not to drop them into the engine. After setting the crankshaft marks correctly, ensure the timing marks on the cam There is an adjustment stud that is locked down with a nut at the top of the exhaust rocker arm. in half and start with #1, then #2, finally #3. above the air box assembly (third picture below, circled in green). Pull the three rear plastics tabs out of the rubber grommets. Hello i have purchased and 08 CRF450X about six months ago and much to my disgust have only riden about a dozen times. Remove the three valve cover bolts (fourth picture below, circled in green). Originally posted by hondaman01@Oct 17 2005, 05:09 PM the decompressor gap should be at 0.006 thousands thats what the manual says. Therefore, if your spec intake valve clearance is .006", this converts to 0.16mm. Take care to ensure that you don't drop the small shims or the intake buckets If all four of your valve clearances are within the cam manufacturer's specs, you don't need to make any shim changes and can re-assemble the bike by After the hrc kit install, i put about 10 good solid hours on it with no problems, and i was as happy as could be, it was super fast, and preformed PERFECTLY, never had a problem starting hot or cold, allways ran perfect. Show 10 post(s) from this thread on one page. I generally clear a space in my garage to put the larger parts such as the rear plastics, It's generally much easier to break each cam sprocket bolt loose when its at the bottom, away from the top frame rail. After the cam sprocket is secured to the frame, you can now slowly back the cam chain tensioner screw out to put To accomplish this - turn the engine over via the 8mm crank nut on the right side of the engine; but be sure to return the engine to the top dead center position bikes as well. When re-installing the cam sprocket, the cam chain tensioner will need to be screwed all the way down into the engine.