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That is exactly what Bing sent, so they are consistant. Bobby Lucas confirms those pretty much too, but my 400 is running rich down low and flooding/fouling when restarting.

I know for sure a $450 new PVL makes jetting wwaaaayyyyyy less crucial, with a big fat spark cold OR hot.

Its just so hard to cough up that much, with a seemingly fine motoplat, but that upgrade worked on my last 400, I should quit restoring and then selling my sorted bikes.

An old timer once told me I'd be surprised "how much jetting is in the magneto" and I think he is right.

chilly

Also - The New Bing I ordered came with a tickle AND a lever choke. I may have made a mistake when I simply asked for it set up for MC5 400, no specifics.

I used both enricheners starting the bike in the driveway, it started, but died when the lever choke was returned upward and would not restart at all. Very wet plug. The Bing seems tilted pretty steep compared to my <CZ> experience,, should I set the floats less than 90 degrees when level?

also VERY tight getting in there to do any work requires a long disassembly. The pipe is on the way of the carb, the tank is in the way of the pipe, the engine brace is in the way of everything. Ah but the Penton is more sophisticated and worth the added effort. I just wish the Bing were more predictable, accessible.

BTW, can't get to the airscrew at all while carb is installed, ugh...

230 slide
fat needle all the way down (uppermost clip pos)
185 main
50, then 45 pilot

we'll see in FL!
cell # 281 844 2920, I'd like any help you guys could provide, team owner Diamond Don is no tuner either!

I have a "new" MC5 400 to sort also. It started right up after a complete resto, but my neighborhood simply is not condusive to fine tuning/jetting, so I head to FL without knowing of the thing will really go!

How about using the Friday CC event to tune, with an hour to "race", I can ride it, get it hot, and pull into the pits for jetting changes, return to the "race" to see if it's better or wose.

I'll bring a few Bing parts, but will be looking for other poggers there to lend some advice. Please be kind to an expert rider, but mediocre tuner!!

Chris "Chilly" Pepper Richardson
Diamond Don Racing - Team TX
come visit under the TX flag!

Hi Randy -
ebay Item number: 4503088726
'77 Penton 400, nice place to start!

MC5 400 now listed in Ebay, want it to go to a good POG home!

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4503088726&sspagename=ADME%3AB%3ALC%3AMT%3A1

item # 450308872

Please keep me in the loop on this project. I'd like to see the specs and how to get the pipes we want made to compliment the porting. They must have more expansion!

Chilly

I also had a pair "relined" by vintage brake. The rear lining separated from one shoe and locked up the rear wheel at speed during the national in AZ.
Not my kind of excitement!
CR

 

Same here - I got great results and quick turnaround. just do it!

 

Hey gooddirt, any news on the forks?

Almost done with my'74 Mint 400, need Ceriani 35mm x 210mm.

 

Thanks, Teddy - I just emailed the guy in CA, we'll see how it goes - he did not have Penton applications listed, but I'll keep the group posted!

see you at north 40 this wknd???
CR

 

No rain forecasted. Maybe very dry???

They'll need to lay down some aqua!
CR

 

Mike -

What about the pipe makes it "torque"?

does it get real fat (expansion chamber) as it bends over the motor?

or does it snail longer in the front rather than "90" twice back stright over the motor?

Is the pipe still available?
I ride expert too, and cannot find a good pipe for my Mint 400 project...

CR -
recent Penton titles:
2001 AHRMA Historic 500 expert nat'l champ
2002 AHRMA PV Open age expert nat'l champ
(Trying to get off the CZ in Sportsman)

 

OOPS! here is the email referenced above:

[email protected]



 

I did the deal with that guy last month. It went GREAT!

My records show his email is
(and I kept it b/c I'm would send him another).

The seat I sent him came back killer. He replaced the cover, Penton/KTM silkscreen on back, mounted streched tight, centered, everything a fussy owner wants.

(He even repaired a small crack in the base with resin)

$60 + shipping

Good Luck, mine turned out fine, but it was my only dealings with the guy...worked for me.

Chilly

 

The answer, grasshopper, is:

timing, anticipation, patience...multiple bikes!