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TECH TIPS |
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Keihen FCR Carbys and Deep Water (4 Stroke Yamaha WR, KTM and Suzuki DRZ) The vent hoses on the Keihen FCR carbys all hang down below the frame. When you do a lot of water crossings the vent hoses when submerged in water create a air lock and the bike normally stalls during a deep crossing and you will not start it until you push it out of the water. Possibly sucking up water into the carby bowl.
You need to remove the tank and get one hose from either side and run them up along the frame rail under the tank and then hang them pointing down. You may need to trim them a little, you can tuck them inside the zip ties already there. Replace the tank and jobs done. Or place them inside the air box.
Fitting heavy duty inner tubes to your dirt bike When fitting heavy-duty tubes make sure you put a coating of baby powder around the inside of the tyre as this helps with punctures. Another good hint also is to place the rim lock about 4 spokes away from the valve stem as this makes it easier to do a tube change in the bush. I use the Metzler tyre levers as these are the best for getting the tyre on and of without the dreaded pinched tube syndrome.
Alloy Throttle Tube for the Yamaha WR 250 and 450 Fit an Alloy Works Connection throttle tube from BALLARDS (www.ballards.cc) for a light and smooth throttle. These are way better than the original plastic one and wont get damaged when you have a crash. Keep the original as a spare for big rides just in case.
Swing Arm Slider Hints for Yamaha WR’s The black plastic chain slider on the swingarm is held on by 3 little bolts and recessed washers. These have a habit of vibrating out. Put a dab of silicone on them and then put them back in. While you have the bolts out run a bead of silicone under the chain slider where it sits on the swingarm, this will stop the chain from slapping and be much quieter also when your slider wears out it wont chew into the swingarm.
Changing the Suzuki DRZ 400 - KLX 400 oil filter When changing the oil filter on the Suzuki DRZ 400 / KLX 400 make sure you keep the little o' ring that sits inside the housing where the filter mounts. If you leave it out you will have a big end failure. Make sure it goes back in when putting a new filter in.
KTM motorcycle rear wheel axle nut tips People tend to over tighten the rear wheel axle nut. This causes premature bearing failure. Remember you need to be able to undo the nut out in the bush. Make sure you have the correct spanner to fit and dont over tighten when your in the workshop. Keep an eye on the bearings as they have a bad habit of failing on a regular basis. When installing new bearings flick out the seal and put a good quality grease inside the bearing and replace the seal.
KTM Oil Sight Glass I have seen the KTM oil sight glass break so if this happens a 20 cent piece will fit neatly and devcon it in place. You then have to get a 2001 model dipstick with the rod to check the oil.
KTM spokes KTM spokes can be another issue as they will break when doing a lot of long corrugations. Keep some as spares.
KTM leaking fork seals The cause could be a little dirt trapped under the seal.
This helps get the dirt out from under the seal. Check the fork leg for nicks and dents from rocks. If you find one get 1500 grit wet and dry paper and sand the nick back so it is not sharp.
Suzuki - Kawasaki 400 throttle cable problems Keep a close eye on the throttle cables where they join onto the throttle wheel on the carbie. The cables fray on the pull cable and snap after about 3000 - 4000 klms. Whenyou have to replace the cables it is a good idea to bend the cableholder in so the cables are not pulling at such a large angle. You will notice the inner cables rub against the outer metal adjustment fittings.
Suzuki - Kawasaki clutch cover fix
You can help prevent this by taking the outer clutch cover off and getting a circular piece of alloy plate 3mm to fit on the outside of the cover and then sikaflex the plate on. This helps to strengthen the cover quite considerably and if the brake lever does does have contact with the cover it will only depress the plate without breakage.
Keihin carby vent hoses Yamaha, Suzuki, Honda, Kawasaki and KTM Keihin carby vent hoses. It is a good idea to have little filters or breathers on the ends of the carby vent hoses as the carby sucks up dust and finds its way through to the inlet valves causing premature wear and adjustment. To check, take off the top plate of the carby which is held on with two allen head screws and see if dust is getting in. Dust is the major factor with valve problems so always have a clean airfilter using a quality filter oil.
Kehin Carby slides
As you can see the carby slide has broken off and gets sucked into the intake of the cylinder. This happens when the bike has done a lot of riding and after a while the plate wears at the bottom of the tabs and eventually fractures. It is good practice to check for this as the broken piece normally gets wedged under the intake valve and you lose compression.
Front wheel bearings maintenance for Yamaha WR250 and 450 The front wheel bearings on Yamaha wr\'s dont have a dust seal so when doing water crossings, mud riding or a lot of riding in general they will wear out pretty quick. Best option is replace the bearing with a dust seal and keep the original one\'s as spares. Check bearings by raising the wheel of the ground and rocking the wheel from side to side. If there is any movement then replace the bearings. This method is used for the rear wheel as well.
What is the correct fuel? Where possible use a premium Unleaded fuel when you fill the tank. However this is not always possible when you in the bush. I always carry octane booster and valve saver to add to the fuel. You can have a little bottle of each in your camel bak so when you need it you have it. Always add valve saver to each tank and regular Air filter maintance will prevent a lot of valve problems on the new Four Strokes.
Air Filter Maintance for Trail bikes The latest Four Strokes are very sensitive to dirty Air Filters. If they Induce a lot of fine particles it premotes valve wear resulting in having to do Valve clearances on a regular basis. This will ultimatley lead to valve failure. Make sure your filter is clean before every ride, use a good quality air filter oil ( not engine oil) and make sure you have it seated in the filter boot correctly. I have seen the filter not fitted properly and the engine got dusted and lasted 15 minutes. When Washing your filter ,wash it out in mineral turps and then hang out to dry. Dont wash it in water after as the water will rot the foam and break down letting in more dirt. "Dont wash your filter in Petrol" unless in a emergency. Petrol expands the foam and lets more dust in. After your filter is dry add you filter oil and then mount it on the cage. Add a water proof grease around the sealing surface and then mount the filter in the bike.
Air Filter maintance is very important in Australia as our continent is the oldest in the world and our dust particles are the finest. Filter skins are extra protection also.
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To fix the problem for hassle free water crossings, where the vent hoses leave the carby on either side they tee off with a black tee and both hoses run down past the swing arm.
The clutch cover on the bike is very prone to getting smashed when the brake lever is forced in during a fall.
This is the front plate found on the latest Suzuki, Honda, KTM, Yamaha and other European models with the Kehin FCR carby.