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Author Topic: M750 Scrambler Project  (Read 54616 times)
koko64
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« Reply #285 on: July 29, 2020, 03:37:07 AM »

Do you mean Mikuni TDMR40 carbs?
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« Reply #286 on: July 30, 2020, 05:12:16 AM »

No, Yama TDM 850 w CV carbs.
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« Reply #287 on: July 30, 2020, 11:33:44 AM »

No, Yama TDM 850 w CV carbs.

Ah I see. I have a few sets of CV carbs, but the oil heater plumbing and lack of response really annoys me. The carb freezing issue and the solutions required add complexity and clutter. The FCR carbs are sophisticated  in design but simple from a maintenance perspective, don't freeze and are the best carburettors money can buy. The issue is cost, so I found a cheap way of fitting FCRs with a choke.

The best performance with a choke are the TDMR carbs or what I've done, but I think the BDST38's for the TDM 850 at least have accelerator pumps which is what Ducati should have done. With accelerator pumps we could tune the midrange for smoothness and economy and let the pumps take care of acceleration. Alas, Ducati put the cheap ass version of the carbs on desmodues and the rest is history. bang head
« Last Edit: July 30, 2020, 04:27:35 PM by koko64 » Logged

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« Reply #288 on: August 03, 2020, 08:29:55 PM »

Thanks to all of you who have provided advice and encouragement. I can say that this project is pretty much complete, bar a few little touches. The bike is quite versatile and fun to ride and my mates say it gets through rough back roads quite quickly enabling me to keep up with fancier stuff. The bike already is associated with many fun memories with the pillion in a million.
I really appreciate your contributions. This is a great community with friends I hope to meet one day. I've met quite a few people in person both local and from overseas. Stay safe out there.
Cheers.
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« Reply #289 on: August 03, 2020, 08:54:46 PM »

And cheers to you chug  Congrats on a great real world build!
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koko64
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« Reply #290 on: August 04, 2020, 03:56:50 AM »

Thanks Howie.
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« Reply #291 on: August 05, 2020, 01:55:23 AM »

Thank You.
You’re one of the most helpful here. waytogo
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« Reply #292 on: August 05, 2020, 04:23:50 AM »

^^^

Yup. I agree with that.  I think it’s great that you took an Italian street bike and changed it to what you want.  Big kudos!!
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« Reply #293 on: August 06, 2020, 03:01:48 AM »

Thanks fellas. Smiley
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« Reply #294 on: December 17, 2021, 06:36:18 PM »

Reviving/updating an old thread.

The scrambler M750 has been a great bike and the GLW and I go everywhere on it. The Pirelli MT60RS tyres are a great utility tyre giving confidence on dirt roads and busted up tarmac. We were riding back through the The Black Spur in Victoria when we were hit by a very heavy summer rain storm impeading visibility. The rain was so heavy the roads couldn't drain and we got through it all carefully at 40-45 mph. They are good rain tyres.


0012185_pirelli-mt60-rs_370 by Tony Kokonis, on Flickr
Above, the Pirelli MT60RS currently on the scrambler M750. They are my third pair in 26,000 kms and work well, but Pirellis are very expensive in Australia. Since my circumstances have changed, I'm going to try the Metzler Karoo Street (below). The Metzlers are a hundred bucks cheaper per pair. I'll report on how they go.

0016245_metzeler-karoo-street_370 by Tony Kokonis, on Flickr


« Last Edit: December 17, 2021, 06:47:33 PM by koko64 » Logged

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« Reply #295 on: January 05, 2022, 11:47:54 AM »

Scrubbed in the Karoo Streets, about 100 miles, then another 50 with a pillion.

If the Pirellis are 80/20 road/dirt tyres then the Metzlers are 70/30. The Metzler rear has a compliant feel to its ride quality. I think the Pirellis do allow more confident high lean angles on tarmac while the Metzlers felt more secure over bumpy and broken roads while transitioning through moderate lean angles. The Metzlers had a slight edge on my 40-45 mph dirt and gravel test road.

Both tyres felt better on tarmac with a pillion. That might be because this road and track rider hates the tread block squirm of dual sport tyres. If someone else has an explanation im curious to know. Maybe the Good Lady Wife's 100 pounds, when added to my 200, just flattens the tread out a little or settles the suspension with these tyres. I had the same feeling with Pirelli MT60RS but not with regular sport bike tyres. I have no other explanation.

Both are good tyres, but again the Metzlers are about a hundred bucks cheaper a pair here in Australia.
« Last Edit: January 05, 2022, 12:19:57 PM by koko64 » Logged

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« Reply #296 on: January 05, 2022, 01:50:08 PM »

I wonder if the additional weight helps keep the carcass in more uniform shape.  Off-road, or dual-sport tires in general don't have very rigid carcass, at least compared to a true road tire, let alone a sport tire.
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« Reply #297 on: January 05, 2022, 01:53:43 PM »

I wonder if the additional weight helps keep the carcass in more uniform shape.  Off-road, or dual-sport tires in general don't have very rigid carcass, at least compared to a true road tire, let alone a sport tire.
Not much experience with Michelins...eh?

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« Reply #298 on: January 05, 2022, 04:15:07 PM »

My early Monsters back in the day used Michelins and Dunlops but I forget. Remind me. I only remember the difference between Michelin and Dunlop slicks.
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« Reply #299 on: January 05, 2022, 05:50:06 PM »

Michelins are so soft you can mount the first side by just pushing them on with your hands, Dunlops are like iron in comparison.

I haven't used anything but Michelins for the past 20 years.
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"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent.”


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