[russinbussin]

That carbon on the graves looks great. 👌

 

[AV80R]

I'm slowly breaking down and might just leave the full system on there instead of the stock muffler [emoji51]

 

[50]

I'm slowly breaking down and might just leave the full system on there instead of the stock muffler [emoji51]

Yeah knew you couldn't keep it stock muffler. 😂👍

 

[AV80R]

 

[AV80R]

Muffler sound check

Final Score:
@Gravesport - 1
Kawasaki - 0

I know I've been hell bent on keeping this bike quiet for the street, but I just can't resist I guess.

Way lighter too. This is just the muffler and not considering the savings from the header

I did have to elongate the mounting hole on the stock muffler to get it to fit up. No big deal.

 

[Swamp Daddy]

The carbon theme is evolving nicely IMO.

Do you have a carbon fibre overlay for the triple yet?

 

[AV80R]

Do you have a carbon fibre overlay for the triple yet?

I don't think anyone makes one. I like how the triple looks so not planning on covering it up.

Next carbon item I'm waiting on is the rear sprocket.

 

[AV80R]

Can't ride the 4RR since the ECU has been mailed off to @vcyclenut get flashed for the @Gravesport system, so I drug out my other little supersport, the Aprilia RS250.

My buddy brought out his V4S, and the Italian mafia express was in full effect all day.

Couple things...

I forgot how visceral the RS250 is. It has an edge that the 4RR just doesn't have. Period! No rev limiter, no traction control, no quickshifter...just a raw high performance GP style bike that takes total concentration and effort to go fast.

334 lbs with full gas and oil is amazing.

Pirelli Supercorsa SC (SC3 compound) track day tires are phenomenal. For me, they feel better than the Dunlop Q5, particularly the front tire. Way more confidence inspiring and they warm up so fast and easy. I will be trying them on the 4RR next.

A Ducati V4S is a stunning motorcycle and I will have one someday.

 

[Buttercream_Symphony]

That RS250 is way too cool. Expansion chambers on sportbikes are the best.

 

[AV80R]

It's a hoot!

Not the best photos, but they're the most recent fun ones from the street.

Some old ones

 

[AV80R]

While I wait for the ECU to come back from @vcyclenut, I need to remove the EVAP and PAIR systems.

The Kawasaki 92068-006 vacuum plug is just the ticket to seal off the throttle bodies where they used to suck fumes from the canister.

The plug installs on the inlet just behind the throttle bodies under the airbox

Next I'll put some heat shrink on the connector that went to the valve that controlled the flow of the fumes to the engine and zip tie it to the bike.

Next I unplug the connector to the valve that controls the PAIR system and remove 4 bolts with a 5mm hex wrench

Leave the reed valves in place. They are necessary in order for the block off plates to seal.

The @Gravesport plates come with everything needed.

Install them in place and torque the bolts to 89 in lbs.

Put the rubber bib/heat guard back in place.

Heat shrink the unused connector and tuck it up out of the way

The Graves plates come with a plug to close off the airbox

Here is all the garbage that was removed

2 lbs 6.1 oz

Instead of repurposing the existing hose to vent the tank to the ground (instead of the canister) I opted to buy some silicone hose from Amazon for $7.

The existing hose is too short for my taste, and the Amazon hose is more compact (8mm ID, 10mm OD) and makes it cleaner.

https://a.co/d/furc5Td

It should arrive tomorrow but putting it in is nothing special, just route it with the other vent tube from the tank and the airbox down the left side of the engine to the ground.

Now I just wait for my ECU to arrive, hopefully Friday.

 

[russinbussin]

How’re you liking the exhaust? I suppose since the ecu is gone you haven’t ridden it too much. I’m thinking of kicking the bucket and getting the Graves exhaust. The M4 is looking pretty good though. Would you say the titanium is worth at nearly double the price? Thanks for sharing your progress

 

[AV80R]

I haven't turned a single mile with the exhaust yet, but super excited to try it.

I got to start it up for about 20 seconds or so and that's it.

I'm a weight weenie, so the titanium exhaust is preferred over steel. I'm also a huge @Gravesport fan so I don't need much of a push to buy their stuff over others. I like their larger tubing, it just looks better IMO and the dyno sheet with the best power and torque curve that I've seen came from @Chuck Graves so that's all I needed to know!

Save the maximum amount of weight and optimize the available power and torque across the entire rev range? Sign me up. [emoji41]

Also their customer service is top notch: Page of Fame: Graves Motorsports

 

[50]

The reed valves are screwed to the plate and are not needed.
So why not remove the actual reed and leave the open plate there to seal the new block off plates? 🧐

Surely the reed has nothing to do with sealing so removing them offers a bit of a simpler setup when reassembling with the new block off plates.

I've already done this on mine awaiting for my pair plates from @SCracing.
I did the same with my VTR1000 and no issues with sealing or needing the reeds.

 

[AV80R]

The metal on metal won't seal. The reed valves make it air tight.

We've used dowel plugs in the ports between the cylinder head cover and cylinder head on other Kawasaki's with the same system, and then you don't need the plates at all.

No’Flo! Emission PAIR Block Off Plug Set – ExpensiveLightweightStuff.com

Another option is to plug the ports on the valve cover right below where the reed valves sit.

Without the plugs in the ports, you really want this to be 100% sealed up.

We've also used custom gaskets in place of the tees Vance's to save weight, but going metal on metal isn't a good idea.

 

[AV80R]

I looked at the Graves site for instructions on their block off plates and it looks like they don't mention removing the reed valves. Only replacement of the cover.

I'm going with the 10+ years of experience I have with disabling the Kawasaki PAIR system on their other platforms.

 

[50]

The metal on metal won't seal.

We've used dowel plugs in the ports on other Kawasaki's with the same system, and then you don't need the plates at all.

No’Flo! Emission PAIR Block Off Plug Set – ExpensiveLightweightStuff.com

But without the plugs in the ports, you really want this to be 100% sealed up.

So basically what you're saying is the without the reed plates still doing their job the block off plates wouldn't seal the exhaust pressure pulses?

Again I'm asking as this has not been clearly addressed on doing the block off plates.
Maybe @Chuck Graves can elaborate on this too.

 

[Swamp Daddy]

How’re you liking the exhaust? I suppose since the ecu is gone you haven’t ridden it too much. I’m thinking of kicking the bucket and getting the Graves exhaust. The M4 is looking pretty good though. Would you say the titanium is worth at nearly double the price? Thanks for sharing your progress

If you kick the bucket will you really need a new exhaust?

 

[AV80R]

So basically what you're saying is the without the reed plates still doing their job the block off plates wouldn't seal the exhaust pressure pulses?

Again I'm asking as this has not been clearly addressed on doing the block off plates.
Maybe @Chuck Graves can elaborate on this too.

Check out the product page I linked to earlier that explains exactly how the PAIR system works and flows air into the exhaust through the valve cover, through a port that has a gasket sandwiched between the head and cyl head cover, and then finally into the exhaust port.

Different Kawasaki engine but exactly the same concept.

Curious why you wouldn't want to leave the reed valves there to ensure the system is sealed?

 

[AV80R]

Also, don't throw away your reed valves! They are $75 each to replace. [emoji857]