Question about Honda CRF 450 R Motorcycles

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Hello, I actually have a small crf 50f and have started it in a year or so. Today after firing it up, I couldn't achieve full trottle without the bike sputtering out. I've drained and changed the fuel and change the spark plug. And although it's better it still doesn't stop bogging down without continuosly pumping the throttle. It does seem to run a little better if I leave the choke lever about half way between off and engaged. Any suggestions would be great! Thanks! Andy

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Disassemble the carburetor and clean it. The jets are partially gummed up from old gas that has evaporated leaving a varnish build up. If you can, soak the entire carb and parts in denatured alcohol for about an hour. Then clean with spray carb cleaner. Spray into every hole and jet in the carb. On re-assembly, lightly seat the throttle and air screws then open each of them one and one half turns. This is the factory setting. Please rate my answer. Thanks.

Posted on Aug 07, 2010

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Hi, Anonymous the vast majority of service, parts fiche, and owners manuals on the internet are "FREE" to download and all service manuals contain wiring diagrams in the back pages. The rest usually charge a modest fee of $15 and there is a handful of obscure, rare, obsolete, and very old models that are no longer or never were available and some were never printed in English. The Indian and Philippine markets are usually in E-book format only, for these rare occasions I shall look on eBay and find the cheapest one available. Most of the manuals will cover your exact make, model, and year otherwise one will be provided that comes as close as possible to your bike and will have most of the same info that an exact manual would have. If there is no $ sign after the manual link it is free to download.
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