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PostPosted: Wed Jun 13, 2018 6:20 pm 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
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Dyno time... :mrgreen:
The dyno shop owner said his dyno has always read a bit low to several other dyno's in the area. Another shop has a dyno (same dynojet 250) that consistently reads 10% higher.
He has done several back to back/same day dyno runs to prove it to other customers....
With that said, my bike pulled a 60.14 at 12000, with 27.04...best run...
Needs a bit of tweeking in mid range as it appears that it is surprisingly slightly lean. I'm thinking air solenoids should make it as close as I will need.
I ended up running 25% 110VP racing gas and 75% premium.

I am finally satisfied, and I can now move on....

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


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PostPosted: Thu Jun 14, 2018 4:48 pm 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5941
Location: Illinois
Nice graph and great results. Now to richen up the mid range to get a little more HP in first. Glad to see you ended up at Valley Racing.


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PostPosted: Fri Jun 15, 2018 11:54 am 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
tz375 wrote:
Nice graph and great results. Now to richen up the mid range to get a little more HP in first. Glad to see you ended up at Valley Racing.

:up:
I'm going to use my Zeel and play with my air solenoid settings and see if I can do that. Might delay my powervalve another couple hundred also to see if I can straighten out the line near the top.

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


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PostPosted: Fri Jun 15, 2018 7:25 pm 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5941
Location: Illinois
It's so long ago that I'm not sure I remember all the details but I want to say that when we retarded the PV opening, the graph took an even sharper up turn and had a more pronounced peak.

Our best result was just a touch over 65 on a blueprinted motor. Wish I still had all that data but it went with the bikes to the new owner.

What fuel did you run that on? Really high octane is safe but tens to burn slower and that can lose you a little power. I'd like to see that motor running U4.4 back to back against any other fuel.


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PostPosted: Sun Jun 17, 2018 8:33 am 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
Ran about 25% VP110 and 75% premium 93....
Timing is at the edge so I need more octane than 93 gives when riding hard on the backroads.
I think I understand where to dial in the Zeel for the powervalves and air solenoids...but thinking is not the same as knowing...
I have the Zeel / Sugaya R2 ignition box parameter info and the A/F ratio / dyno charts...
I can change them, but it's running at a point now where seat of the pant's might not tell me if I'm going in the right direction with small increments

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


Top
 Profile  
 
PostPosted: Mon Jun 18, 2018 6:37 pm 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
Attachment:
IMG_0107.JPG
IMG_0107.JPG [ 278.42 KiB | Viewed 122 times ]


Box of 24 stainless steel valves showed up today....
Making arrangements now with a machine shop to get them fitted to my spare head sometime after I get back from Vacation in July.

Pulled my pipes off the VJ23 to clean them up and get them resealed, as they were leaking just a bit when run up to redline.
Might need stiffer springs...?

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


Top
 Profile  
 
PostPosted: Tue Jun 19, 2018 9:23 am 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 671
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
What engine are the 24 valves for?


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PostPosted: Tue Jun 19, 2018 1:55 pm 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
I need to redo the head on my CBX.
I went through it when i put a new J+E bigbore kit in and cleaned up a head and soda blasted everything.
Then lapped all the valves and put things back together with new seals....
But after about 1000 miles, one of valves had started to leak and I have lost most of my compression in a cylinder. ... :cry:

Image

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


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 Profile  
 
PostPosted: Tue Jun 19, 2018 7:02 pm 
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Novice racer
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Joined: Wed Jan 18, 2012 8:01 pm
Posts: 916
Location: North of Albany, NY
Country: USA
Bikes owned: T500R (now), T500M (30 yrs ago)
Damn. Look at all of them bits.

A reason to love your 2-stroke. Mine runs with only 9 moving parts. :P


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PostPosted: Wed Jun 20, 2018 4:35 pm 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
ConnerVT wrote:
Damn. Look at all of them bits.

A reason to love your 2-stroke. Mine runs with only 9 moving parts. :P


My RZV has a few more parts moving than that.... :mrgreen:


Image

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


Top
 Profile  
 
PostPosted: Wed Jun 20, 2018 5:24 pm 
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Novice racer
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Joined: Wed Jan 18, 2012 8:01 pm
Posts: 916
Location: North of Albany, NY
Country: USA
Bikes owned: T500R (now), T500M (30 yrs ago)
Well, the RZV is a bit more modern than my T500.

I usually go with saying 9 moving parts - 2 pistons, 2 conn rods, crankshaft, 2 sets ignition points, and 2 slides in the carburetors. That's all you need to run the engine, and control its operation.

Seeing all those valves, springs, lifters, and all the other bits reminds me why I love the 2-stroke so much.


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PostPosted: Sat Jun 23, 2018 10:56 am 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 671
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
So it was a faulty valve? or valve seat? on the CBX. Nice bike. I would love a CBX. I own one in my fantasy garage.


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PostPosted: Sat Jun 23, 2018 7:35 pm 
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To the on ramp
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Joined: Wed Apr 11, 2012 7:17 pm
Posts: 280
Location: Northern Indiana
Country: USA
Bikes owned: RGV RGV RGV RGV ......
ConnerVT wrote:
Well, the RZV is a bit more modern than my T500.

I usually go with saying 9 moving parts - 2 pistons, 2 conn rods, crankshaft, 2 sets ignition points, and 2 slides in the carburetors. That's all you need to run the engine, and control its operation.

Seeing all those valves, springs, lifters, and all the other bits reminds me why I love the 2-stroke so much.


I have a genetic condition that makes me look for complex designs with parts that are a challenge to find or fix.... :mrgreen:
But the satisfaction of finally getting it right makes up for all the trouble.....at least that's what I tell myself.


sportston wrote:
So it was a faulty valve? or valve seat? on the CBX. Nice bike. I would love a CBX. I own one in my fantasy garage.


Not sure which it is, but the spare head I have will get all the valve seats redone to match the new valves, so I won't have to worry about the issue anymore. It was a 20,000 mile head I cleaned up and put on my CBX after I put the bigbore in. I'm guessing it is a seating issue, as I do have some compression...just not all the compression it should have. Air was coming out of the intake port when I did the leakdown.

_________________
MY TWO STROKE ADDICTION

RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ22 N
RGV VJ23 T
RZ 350
GT 750 J....sold.....
GT 750 long term cafe project
SX-R 800
KD 80
RZV500R....in my garage by mid February :)


Top
 Profile  
 
PostPosted: Sun Jun 24, 2018 12:13 pm 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 671
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
busa1300 wrote:
I'm guessing it is a seating issue, as I do have some compression...just not all the compression it should have. Air was coming out of the intake port when I did the leakdown.


Could have been a tight tappet or too lean mixture burnt the valve out.


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