. I usually always check people`s sigs for their mods, but I didn`t pay much attention to your sig on this one (my fault for not checkin` it) & I was goin` by what ya had listed in your post.
Nah man...I wasn`t rantin` (it wasn`t intended to look that way anyway...I was just more/less callin` BULLCHIT on it is all).
BB also adds more mass that has to get wound up to the same rpm, which would make for a little slower launch.
Since they also race froma roling start there was not a need for building to a quick launch off the line.
Yeah I know that BBK`s add more reciprocating weight/mass...& the bigger the BBK...the more it adds (that`s why I favor the smaller sized BBK`s...they add a nice boost in power, but they still have a quick rev...which to me is yet another one of those "happy median" things.

).
Granted it does still have the stock carb and head pipe.
^^^^^THAT`S what I`m sayin`!!! Those 2 things right there are KILLIN` your "purpose built high RPM motor" (which ya basically acknowledged that fact & you`re aware that ya need to upgrade those 2 things in the future.

).
The two situations, the 400EX and the 450R are actually at different locations, and it different times. I guess I should have noted that. The last time the EX lined up it was a joke on the TT track, the only time he caught me was when I was stock.
That`s basically irrelevent...the main thing is...that the guy on the 400EX catches ya in the corners...that means that he`s better at cornering than you are (regardless of what track it is).
The DASA motor was after the building of the 400 motor. I didn't just pass him in the turn, I ran off and left him afterwards. Note that I "looked back... and he was still 15 feet behind me."
Yeah I figured as much...I in NO WAY figured ya were sayin` that ya were smokin` him w/ your totally stock motor!!!

. I STILL don`t believe that you were runnin` off & leavin` his DASA built 450R w/ your mods though. By all means...post up some videos of that chit & let me evaluate them.
It's not all rider that passed him, and I don't have a stock CDI, it's a Dyna FS. As for gears, they're not TOO tall for the motor, I still hit 5th if I'm having to run hard, which is when I pass the B/S'ed banshee, and the 502 YFZ. In case you think I'm running too short i am running a 15/39 gearing.
I didn`t say that it was ALL rider...but it`s DEFINITELY NOT ALL MOTOR that`s gettin` ya (w/ your Z & the mods it has currently) around that DASA 450R though!!!...Sorry, but I`m not buyin` it that your Z is walkin` on his 450R...hangin` with it...MAYBE...but walkin` on it...NO.
As for your specific gearing...it`s hard to say/tell...I`d have to actually ride it on the track/tracks that you ride/race on & evaluate myself as to whether or not I`d run the same gearing. We may not agree on/like the same gearing for any given track.
Another thing that tells me it's not all rider, is the weekend I broke my ankle I was actually running through a crowd of guys that ran the national events, and one of which won 4 of the shorter tracks.
^^^^^In that case...ya need to start runnin` the Extreme Dirt Nationals then if ya have the funds to do so. It sounds like ya have the potential to bring home some trophies in that series.
Don't know if you've seen the nationals run, we were getting and easy 60-65 mph in the turns, and it's nothing on a good hot lap to run 80's on the straights.
I`ve only been to the `85 (or `86 maybe it was) GNC TT National at Ashtabula (the Pro 3-wheelers were clockin` 90MPH on Pine Lake`s front straight...those were the days of Marty Hart/Curtis Sparks/Mickey Dunlap/Jimmie White/Tim Helter/Gary Denton/Donnie Banks) & to some of the GNC TT Nationals at Deerfield Speedway back when they also hosted them & then to Buckeye Speedway when they took over the 2nd Ohio GNC TT National events from Deerfield (this was all back in the mid-late `80`s & through the 90`s...back when it was all one series that combined MX/TT/Oval racing to crown the AATVA/GNC Championship)...Farr/Hitt/Byrd/Jones/Goodman/& Keith Little were ALL just YOUNG pups (Gust was in his prime back then of course) & they HAULED AZZ on Deerfield & Buckeye`s back straights too!...So yeah...I KNOW what the speeds involved in Oval & TT racin` are.
Granted I COULD go with the FCR and larger head pipe to really run through the pack, but I plan on building another 450R next year, so what would it matter.
If your Z runs THAT good now w/o a better carb & headpipe...why are ya givin` up on it & buildin` another 450R for next year?...I mean chit man...from the sounds of it all ya needa do is do a carb & headpipe upgrade & you`ll be "runnin` through" your competiton now!!! (at least to hear you tell it anyway!!!).

. A carb & headpipe is ALOT cheaper than goin` out & pickin` up another 450R & moddin` it up last time I checked.

Yup. (See above for explanation on that.