guzzigray
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Posts posted by guzzigray
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On 6/10/2021 at 1:09 PM, rich46 said:
Hello to all ,
We are looking for wheels for our Le Mans Race motorbike. We are allowed to use 17" wheels because of the difficulty of finding race rubber. So to that end does anyone out there know of a wheel manufacturer building carbon fiber or mag wheels to fit our motorbikes. I can find 18" ones but finding 17's is starting to be a bitch and Guzzi OEM wheels weigh a ton !
Thanks in advance
Rich
But if you insist on 17s I’ve seen Honda CBR wheels used. The rear hub can be machined down and a Guzzi hub bolted up. Daytona/Sport non Cush drive drive splines are available from MG Cycle.
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On 6/10/2021 at 1:09 PM, rich46 said:
Hello to all ,
We are looking for wheels for our Le Mans Race motorbike. We are allowed to use 17" wheels because of the difficulty of finding race rubber. So to that end does anyone out there know of a wheel manufacturer building carbon fiber or mag wheels to fit our motorbikes. I can find 18" ones but finding 17's is starting to be a bitch and Guzzi OEM wheels weigh a ton !
Thanks in advance
Rich
18” race rubber by Continental, Bridgestone and Metzeler is readily available, cheap and sticky. Marvic can make you a set of magnesium wheels in 18” for around $2400. Weight for both is less than the weight of 1 OEM.
17” tires are readily available but now you have a wheel problem.go to 18s and you have no problems.
speaking from experience here, not BS. I run 18” Continentals 130 rear and beat guys on 150/160 wide 17s all the time.
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On 4/7/2020 at 4:57 PM, pete roper said:
It is what it is. If we have to sit around entertaining ourselves at home for six months to a year it will be pretty drac but it's better than risking going out and infecting someone who then dies. At the end of the day it's not about *Us* as individuals. If one good thing comes out of this it will perhaps be that people will start thinking about each other a bit more.
I'm also hoping that just maybe the disastrous economic fallout might make people reassess what is actually important in their lives and lower their expectations a bit. I've been very tired for years of overhearing 'Yummy Mummies' complaining about how tough they are doing it when their first house is a new five bedroom McMansion, they're driving a Range Rover as a grocery-getter, their husband's all have boats and Harleys and they themselves have $20,000 of fake tits nailed to their chests! It's all on the never-never and I'll bet they have credit cards that are all maxed out too. Sorry, if you're that profligate and incautious I find it very hard to be sympathetic if you can't pay your mortgage or electrickery bill when the world goes to shit.
Look after yerselves, look after others, especially the oldies, (Yeah, even older than us!) wash yer hands, don't go eating other people's boogers and stay the f*ck inside. It's not rocket science.
Chuck's building an aeroplane to keep himself busy. What are the rest of you lot doing?
There’s an awful lot to agree with here.
Pete Roper for president.
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2000 V11 Sport - only owner
113,016 miles/ 182.284 km
this is wild......
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2 hours ago, docc said:
How about a pic and some scoop on that "1134cc/90hp Moto Guzzi?"
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"CSRA Vintage Superbike race with AFM. Sonoma Raceway. 8/31/19. On board Moto Guzzi. 1134cc. 90hp"
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Message sent
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Mobil 1 V Twin :https://mobiloil.com/~/media/amer/us/pvl/files/pdfs/mobil-1-oil-product-specs-guide.pdf
High zinc for flat tappets. Developed for air cooled motors. Perfect
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Checking back in. And again thanks for the ideas. The bike had spend quite a lot of time on the dyno and had never had a fueling problem so under these conditions I ask myself what things are different from the dyno run and running on the race track ?
1. Ambient temperature is different (high 80's verses 100's) BUT when we raced at Willow Springs it was in the 90's ??
2. We were at 5000 feet in altitude Willow Springs is around 2000'
3. We were getting our fuel from a MotionPro fuel bottle rather than the Moto Guzzi tank
4. The Miller course was lots of short straights and tight corners.
Because the motorbike spent so much time on the dyno I can't think how the carburetors could be at the bottom of the problem. Not once did we see the engine act as if it was fuel starving. The last few pulls were all right on the money as far as the sniffer readings indicated and the engine kept pulling as many RMP as we dared to ask of it.
One thing we found as we pulled the motorbike apart was that the petcocks that came with the fuel tank (they looked to be fairly new) were very small 1/8" and the ones for the big motors are twice as large. When I asked the local MG guys I was told they came off a fairly small engine bike maybe no bigger than a 650cc.
At this point all we can do is attack all the things we thing might be at the bottom of the problem and test again at the last AFM race at T-hill in North Ca,
Thanks again for the input.
Rich
At what altitude did you do the dyno runs ?
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I would think the biggest limitation on fuel flow would be the size of the main jet. I can't believe that the petcock can't flow as much fuel as your main jets can if it is clean and in good shape. Next limit on fuel flow would be the needle valve that lets fuel into the carb float bowl. The size of that opening determines how much fuel can get into the carb. Again, I can't believe that your needle valves can flow more fuel than your petcock if it is clean and in good shape.. But a dirty or clogged petcock, or needle valve, could be an issue.
I suspect the behavior your seeing has to do with fueling, and closing the throttle and re-opening it may be adding extra fuel. But it may be simply that your main jets are not big enough. Fueling issues can be hard to figure out. But I have my doubts that your petcock is the root of your fueling issues unless there is something physically wrong with it. Here is a simple test, pull the fuel line of the carb and let the fuel run into a bucket. You can see the max rate of flow that petcock supports. It is likely that it will flow more fuel per minute than your motor can consume. You can actually measure its flow per minute if you want.
If that flows enough fuel, do the same test but do it at the carb. Meaning, pull the float bowl off the carb with it in a bucket and see how quick the fuel flows into the bucket. As before, you can calculate the fuel flow per minute and see if it is more or less than your max fuel consumption per minute at WFO.
+1
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1134cc endurance racer. 2015 Spa Francorchamps 4hr finisher:
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In this forum is a pic of the interior of a breather box
http://www.guzziriders.org/lm-breather-box-valve-fix_topic2432_page2.html
Same thing happens on bikes which use the frame tube as the breather.
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The core of the thread was keeping oil from escaping the breather. Negative pressure is really just a potential side benefit of changing the breather arrangement to better control oil transport.
Biggest breather tank you can fit in the space ( with an oil seperator if possible ) available with a drain back line and the tank vented via a tube out the back of the bike.
Ciao
+1
Just make sure oil return is below the level of the oil
Yeah, I always hear this, but what is the physics behind it?
Then the oil mist/pressure can't be blown out the oil return pipe (against traffic so to speak
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The core of the thread was keeping oil from escaping the breather. Negative pressure is really just a potential side benefit of changing the breather arrangement to better control oil transport.
Biggest breather tank you can fit in the space ( with an oil seperator if possible ) available with a drain back line and the tank vented via a tube out the back of the bike.
Ciao
+1
Just make sure oil return is below the level of the oil
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And i'm in LA and have the necessary tools if you need help. 213 392 4042. Andrew.
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If that's just bearing material you could probably save it. Try polishing it with 1500 grit wet and dry and WD40
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Maxton
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People are holding up a Daytona winner as a good example, I would have thought a Daytona bike and a TT bike would like chalk and cheese as are the tracks.
Fast on one track does not always carry over to the next.
The bike I posted is an ex Manfred Hecht built, Dr John style. It's a great starting point for either …….
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Mike Rich twin plugging mods: Gained 4hp overall and now have 10hp more at 8,000 rpm compared to single plug.
Did you change your advance curve for the dual-plugging?
Yes. Went from 34 to 32 degrees
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Mike Rich twin plugging mods: Gained 4hp overall and now have 10hp more at 8,000 rpm compared to single plug.
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That's great!
and thanks, Tikka!
this is more lile 'show us what you do with your Tontis'
more pics of our raceteam HERE
Complete story for those who can read dutch, but pics do say enough, don't they? MGB Racing
Have you thought about doing the 4 hrs at Spa in July??
Would be great to see your Guzzi.
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She certainly looks like a blast! Have you any plans to race her in the UK, or maybe do some track days next year?
We have done a couple of informal track days in the UK before with forum members and its well overdue that we do another!
There's a good chance I'll be in Europe next year for an extended time. If that's the case I'd love to do some trackdays in the UK.
Just saw an article of your mighty fine Guzzi in the August edition of Classic Bike. Great looking bike, mister G-Gray!
Cheers
Søren
Thank you. Motorcycle Classics here in the States are doing an article about our endurance effort at Spa . Should be out soon.
Regards, Andrew.
ZDDP levels in motor oil
in Technical Topics
Posted
Mobil 1 V Twin 20-50. Available at AutoZone.
mobil_1_product_guide.pdf