I've noticed a distinct front fork knocking for a while from the front of my bike. I sometimes get it riding along and it felt initially like the suspension wasn't coping with bumps in the road but I now don't think it's suspension as I have softened the settings off. However I also feel it through the bars when braking hard - could it be something like steering head bearings? If it is how can I check them?
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Re: Distinct front fork knocking
Put the bike on a stand and grasp the forks at the bottom and push in / out to see if there is any play also check pads in the caliper and brake hose knocking against fork leg etc. if you dont have a stand (or a milk crate) you can sometimes feel play by rocking the bike back and forwards with the front brake applied. Other things to check are that the front tyre pressure isnt too hard .. and I would suggest you bleed the air out of the forks via the top philips screw ,
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With the bike at rest, tie a cable tie/zip tie on the fork inner hard against the fork outer. Ride it normally and then check how far the tie has been pushed away from the outer seal. If the distance is more than halfway along the fork I would suggest there is a problem. If not much movement then I would check your bearings
Your bike has had major changes to the geometry. You already know this and are probably very careful when riding it as a result. I am presuming you are not able to ask your dad for advice on this matter now. I am sorry for this. He must have been a very cool dad.
I dont think I would make any structural changes to your dads design unless you could revert to an earlier version by changing the fork. I would consider different tires, however.
Did you buy this bike from a dealer if so, I would take the bike back to them and state the problem. Ask them if there is a recall notice for this. Also inform them that it needs to be repaired under warranty as you've already had an accident while riding it.
The front forks are adjustable to the type of ride you want. First, set the rear shock to the setting you want soft, medium, or hard. There should be max pressure information in your owners manual and on a sticker on the front forks. Typically the most pressure that can usually be put into a Honda front fork is around 14 PSI. Add, carefully, 10-12 PSI using a hand or foot bicycle pump with a gauge on it. You will probably find this way too stiff. Be careful not to put too much pressure in the forks or you will pop the seals and have to replace them.Then with the bike loaded the way you are going to ride (soft for comfort or hard for two up riding) bounce on the seat. What you want to feel is the front and back suspension dropping at the same time. This is how racers set up there motorcycles for hard cornering. If both the front and rear of the cycle drop together you have an easier time controlling the bike during extreme maneuvers. Since the front is usually stiffer than the back(you added pressure there) slowly bleed the pressure out of the front fork tubes until the the front and back drop together while you are bouncing with the bike loaded the way you are going to ride. Now you are set up for extreme riding conditions. Soft or hard that is how you set up all motorcycle suspensions by balancing the the amount of front cushion/pressure to match the back cushion/pressure.
Thanks for the inquiry!
From your information I can't tell if this is a off-road bike or a street bike. With the extended swing arm I'm suspecting off-road. In either case it's very much same issues. You have two issues and we will deal with them separately.
Chain catching sound:
In low gear when you have maximum torque applied to your rear sprocket & wheel many times the primary sprocket (smallest one under the engine side cover) will slip and actually jump teeth. You indicated this is the third season, so it's seen a lot of wear. It would also explain that when you adjust/ tighten the chain tensioner the noise is gone as the front sprocket is not slipping in the chain. If this happens a couple of times the front sprocket is ruined. Pull the front sprocket cover and inspect the teeth. The teeth will be smooth and ground away if this has occurred. Most off-road riders go through 1 - 2 sprocket and chain sets per season with the abrasion form the sand and mud if they are serious about their riding. Replace front sprocket or both sprockets & chain.
Other possibilities are that you have lost your chain guide or the plastic wear plates inside the chain guide are gone and the chain is banging against the metallic sides or your swing arm making the chain jumping sound you have described. Replace the guide or wear plates to solve this.
Whooping sound on front of bike while coasting:
This familiar sound appears to be related to your front wheel. The best way to test this is to set your bike on a bench, crate, or test stand so the front wheel/tire is off the floor/ground and spin the wheel. Your rim may be bent allowing the tire to rub against the fork tubes or front fender making the whooping sound. The engine noise drown's it out under power but noise is audible when coasting with the clutch in and engine idling. The simple fix is a spoke tightening and adjustment to properly true the wheel. You will hear if its a bearing or something else being rubbed against by a wooble or something out of round (run out) causing the whooping sound.
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There are three most common weights of fork oil. 5W is a light oil for a smoother ride, 10W is a heaver oil for stiffer suspension and 15W is mainly used for a stiffer ride such as racing. I have found 20W and 25W oils but they are not that common. If you are a pleasure rider 5W or 10W would be the right oil for you. If you are always "in the twisties" and riding the limits of the bike, go with the 15W.
a trace is normal, to much is not. that probable is due to dryed out fork seal, as they ere not getting lubed due to inactivity. the air fittings are for ajustable damping. if you ride 2 up or yourself being heavy or you just want a firmer fork suspension. i don;t know the range for your bike. try asking the dealer.or just put in 5 lbs. and try. if the presure doesn't last then you have leaky seals......
Hi, Front end vibration can be caused by front rim/tire out of balance, worn wheel bearing(s), bent front rim, or fork misalignment. Since you recently had fork work done, I would first check the forks for proper alignment, then have the bike on a stand and spin the wheel to see if there is wobbling. To check for bearing wear, while the front is off the ground, try to rock the wheel from side to side. If you can feel or see movement, you will need new bearings. Hope this helps