We would like to run a 'D' cylinder with a 30mm Bing. Any suggestions on jetting?
Thanks
marc biro
n/t
Thanks!
marc
Marc,
I respond only because it is you and I so admire your bikes and work. That jetting will leave you with a 125 that is harder to start and blubbering on the bottom. The needle jet and pilot jet are too rich, I think. Try 276 and 35, 40 max.
Larry P
n/t
Merlin,
This is exactly why I try not to play here. Many are just TOO sensitive. I meant no disrespect so sorry you feel slighted. I merely was trying to help Marc too from my experience. Just giving what I felt was another opinion. By the way I never seized a 125 Penton with that jetting and I have put in a couple of laps. I should have e-mailed Marc directly. My mistake and I will try hard to not make it again.
Larry P
n/t
Slide -# 1--Needle-# 1--main jet-150---needle-#2.76 or 2.80--pilot jet-#35or #45--atomizer#40-404----Needle all the way up #2.76 , all the down for #2.80. these setting for low air flow ---good air flow go Main-jet- 150-155---p-jet #35--- needle #280-- needle position #2 (middle) --Marc tell Victor to go MIC-
Not all poggers get online everyday. I see Larrys posting as( HIS ) input , I think you read into it the wrong way .Keep it COOL[8D][8D][8D]:):):)[:X] -------P.S --To anyone ,Do not use a needle jet from a different type or size of bing .I understand that there are three sizes but have the same number on them. LG
Hey Poggers,
Didn't mean to stir things up! I respect all of your opinions and appreciate your input.
marc
larry G,
I tell him until I'm blue in the face to go Mikuni. I think I'll just stick a carb apron around it. he'll never know what's under there!
marc
Larry P,
no offense emanated from your jet setting suggestion - it was completely benign.
fwiw, I sense a 'sensivity pattern', but it's not Larry P's ... http://www.pentonusa.org/forum/topic.asp?TOPIC_ID=8353
Cheers.
lks
Larry Seale
I choose to ride
Mr. Good:
I must admit Marc talked me into a Mikuni for the 125 "D" and guaranteed I would be able to pop wheelies through four gears with it like I used to when I was a kid.
I will, however, assemble the 30 mm Bing and 28 mm Bing and have them in my racing parts box for a quick switch, when the other Euorpean Bikers say I am Japanesing my Penton.
My experience is when the Bing is right and the rider "Shifts like a Gentlemen" the Sachs is unbeatable !
At least in my mind !
VM
PS Mr. Good, my super secret Sachs will be ready for Santa to take it out for a spin.....30 HP ? Hang on ! You'll be seing me out there in March or so....at least my taillights! And thanks for your input.....
V Monz,
Even with reverting back to the 'European' carb, you may be surprised at what 'non European' parts reside between the 2 side covers with the word Sachs on them!
marc
ps...I only guaranteed wheelie's if you ran a Jackpiner magnesium front hub.
Marc.
Are you running for President......you're waffling :D
See You.
VM
My stuff runs right while winning, that is what counts. I never was and never will be a "groupie".
Merlin,
We are all a part of the Penton Owners Group. Sometimes it is good being a part of a group because as Ray Kroc founder of McDonalds once said, "No one of us is as smart as all of us." Each and every opinion is valuable and that is what makes POG good.
It is also good to be an individual and to march to the beat of a different drummer. If there is something that works good for you that is valuable and good. No one here wants to take that away or devalue it.
We are all winners wether it is multiple National titles or just getting that New restore to run. Have a better day and know that no one is against you.
Just my opinion but I think I speak what most would say when calm.
Larry P
Very well said Larry. Personally, I appreciate different opinions on the same topic. It gives me more options to explore.
Steve Minor
Wilmington, NC
Larry and Merlin, I very much enjoy reading the information you both have to offer. It is very clear you both have a wealth of Penton knowledge. If there were only one way to do things it would be easy and all our bikes would always run perfect. Keep the info coming.
Dennis Jones
On the subject of jetting has anyone here played with Japanese carbs that are power jet equipped on Pentons? I remember that when Yamaha came out with power jet Mikuni's the mid to high rpm range became much crisper. Yamaha used much smaller main jet on same model than bikes without power jet because the power jet worked better at full throttle. I am sure they are harder to jet correctly initially though. Ted
Quotequote:Originally posted by t20sl
On the subject of jetting has anyone here played with Japanese carbs that are power jet equipped on Pentons? I remember that when Yamaha came out with power jet Mikuni's the mid to high rpm range became much crisper. Yamaha used much smaller main jet on same model than bikes without power jet because the power jet worked better at full throttle. I am sure they are harder to jet correctly initially though. Ted
Powerjet carbs are illegal in the vintage classes, As are Lectron carbs.
You can only use them in post vintage classes. Besides they were not that much improvement if at all. A well tuned Mikuni VM works extremely well.
Dwight
Mikuni makes a powerjet kit that retrofits to the VM carbs. I have never heard of anyone using one, but I am curious and might get one to try it.
Brian
'72 Six Day (on loan from Ernie P.)
Quotequote:Originally posted by brian kirby
Mikuni makes a powerjet kit that retrofits to the VM carbs. I have never heard of anyone using one, but I am curious and might get one to try it.
Brian
'72 Six Day (on loan from Ernie P.)
As I said, Powerjets carbs are illegal for vintage racing. That is why nobody uses them. They are not much if any improvement over a well jetted VM carb.
Dwight
You are correct Dwight, I knew flat slides were not legal, but I had forgotten about the powerjet and accelerator pump rule.
Brian
'72 Six Day (on loan from Ernie P.)