Should have known better..... And non VFR bike's updates

[keny]

Well looks after all that theory #1, corrosion, is the reason for the worn cam chain as cylinder walls 

 as seen in the video there is a lot of piston play, thing is the pistons are in speck but rings has wear, the cylinder walls has big wear, it's oval to, the head is actually ok, cam bearing surface are ok, no big wear or sign of bad oil there, also no sign of valve seals leaking thro oil (the carbon buildup is from oil coming through piston rings), however there is sign's of corrosion under the valve cups at valve chims.

This give the conclusion the bike has been stored in a environment that has made condensation inside engine that has made cylinder walls rust as cam chain. The thing that supports this is that there is sign's brown red fluid has come from the engine breather type into air filter box.

So the engine CSI is ready, a healthy cylinder group whit pistons has been ordered.

 

 

[keny]

Had a few bits I bought this weekend 

Fist a ZR7S meter combination 

Paid 20€ for this one including the speedo wire, not bad, will be for the 550 zephyr 

 

Then paid 50€ for a good set of ZR7S top fairings

Has a few small chips in paint but no cracks, my other has a crack.

Sure my bike is Red, I like the blue version better actually and think I'm going to just put them on and see how it looks 

 

And the secondhand cylinders for the ZR7S should arrive today...

[keny]

I guess the ZR7S needs new sprockets as chain to......

Indeed worn out 

[keny]

Now this starts to look like a nut and bolt restauration......

But actually just a cam chain change, whit out using a link, and to check engine condition further same time.....

[keny]

Season 2025 opened today, not that warm but sunny and roads not that bad

The trusty F2 CBR did fine

[keny]

I had plans to do the first ride of season on the SevenFifty but even I knew it didn't run perfect efter sitting some time (even it had done it after a full service my friend did to it) I was hoping magic fluid in the fuel would sort it like on the CBRF2 the other year, but not with the SevenFifty, did only did run whit choke on after sitting a few months more. So....

And indeed idle jets clogged... The rest looks fine through. So some ultrasonic clean is needed 

[keny]

Well been busy, then weather got cold so no test ride could be done, even the SevenFifty was back together.

But today finally did a test ride, sadly not midday as temps where summer like and sun shining, but not to bad temp wise but roads were wet after some rain late afternoon 

So how did it run and how did I like it?

Well didn't run perfect but better as I rode it, but I think it will need new sparkplugs to run good. As a bike there is thing's I like as not.

Engine pulls great, just struggling at lower rpm, that can be a issue aside plugs ( sounds it's not running on all 4 below 3k) from the fact that a former owner has liked a loud bike and taken out the internals from the original silencers, so they are open as Loud! Not a things I like as prefer.

The brakes are good, so my rebuild is a success. It's a relatively fast steering motorcycle, a thing I like, but fork is a but soft feeling and don't help how confident the ride feel's. Ride position is not as good as the ZR7S, mainly knee angel is tighter.

I'm also used to motorcycle whit top or full fairing so no wind protection feels a bit odd but guess it's a thing you can get used to?

So now new sparkplugs and some more riding to then decide is this a motorcycle that I will love or list.

If I turn to love it might change to rubber that feels better in the wet

The Road 5 I got for the ZR7S where great rubber...