50k mile Maintenace and adjustments

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Heisenburgerrr

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I purchased the motorcycle from a dealership at 47k miles. After 2 weeks of riding it the rotor/stator gave out and I had it replaced along with a new chain, sprockets and a new swingarm. I felt the brakes a bit spongy and read online that usually that calls for brake fluid replacement. I couldn’t really see a color through the sightglass so preceded to opening the brake reservoir to inspect. I then closed the reservoir and noticed there was a bubble in the sight glass. I didn’t think much of it. After riding it, going on a tight turn, the bike starts to jerk aggressively. I wasn’t applying breaks but want to know if the bubble in the brake line has something to do with the jerky turns.
 
Heisenburgerrr said:
I purchased the motorcycle from a dealership at 47k miles. After 2 weeks of riding it the rotor/stator gave out and I had it replaced along with a new chain, sprockets and a new swingarm. I felt the brakes a bit spongy and read online that usually that calls for brake fluid replacement. I couldn’t really see a color through the sightglass so preceded to opening the brake reservoir to inspect. I then closed the reservoir and noticed there was a bubble in the sight glass. I didn’t think much of it. After riding it, going on a tight turn, the bike starts to jerk aggressively. I wasn’t applying breaks but want to know if the bubble in the brake line has something to do with the jerky turns.
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Um, no. When you replaced the reservoir lid, you want to make sure the flimsy rubber gasket is laying smooth on top of the fluid. I replaced mine and ended up with the same issue, i.e. not quite enough fluid to cover the sight window, but my brakes work just fine. I do wish they made it easier to get reservoir level for that job though!
 
Heisenburgerrr said:
Hmmm, so the jerkyness was probably user error? Are there any things I should be looking at when reaching that high mileage?
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That is what I'd suspect. I've had similar instances where the bike does "something" or sounds a little off to me, but I'm hyper sensitive to that stuff. If it doesn't replicate the issue within a few rides, I usually attribute it to something I did...

As for mileage, what year is the bike? Do you have any of the previous service records? If not, I always change out all the fluids and check the condition of the air filter, spark plugs, and hoses. The biggest maintenance job is a valve clearance check (and possible adjustment) every 26k miles. Depending on if it was done or not, then it is either waaaay past due or coming up due soon.
 
Its a 2008. I dont have any service records. All I know is the previous owner modded it by adding a new exhaust slip on, dyno charged it and threw in quick shifter. I’ve experienced charging issues on the bike and decided to open it up. I then saw that the wiring was held by electrical tape and not your normal wire caps and therefore wasn’t making contact. So I can only assume that the job (and possibly any maintenance) was done in home. Is the valve clearance check a job I can do with the right tools, or do you suggest I bring it to a shop?
 
Ugh. I found some wiring issues on mine as well. I hate electrical problems! lol

I did the valves on my F4i several years ago. I would say it's a job that requires a lot of attention to detail. Not "hard" per se, but does require staying organized and taking your time. There were two vids I used as my guide and, while not specific to the FZ, will give you an idea of the job -

How to do Valve Clearance Check on a CBR600 F4i - YouTube

How to do Valve Clearance Adjustment on a CBR600 F4i - YouTube

I do think the FZ might be a little tougher because you can't access from the top but have to go in from the sides...
 
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