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**dustom_99** · 06-30-2015, 03:46 PM

re: Dustom's Turbocharged Harley 1250

Originally posted by kinshuk.arya View Post

If I am not wrong the Michelin Eagle are car tyres. Even a slight leaning of the bike in corners can lead to a mishap.

And your assessment of problematic lean is based on?

I already said that, yes they are car tyres.
I already tried car tyre on my diesel bike , and I don't agree with your assessment of handling. Yes they handle differently at low speeds and follow bumps and contours of the road but once above 40-50kph they do just fine. And they have amazing wet and dry grip .

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**kinshuk.arya** · 06-30-2015, 04:15 PM

re: Dustom's Turbocharged Harley 1250

Originally posted by dustom_99 View Post

And your assessment of problematic lean is based on?

I already said that, yes they are car tyres.
I already tried car tyre on my diesel bike , and I don't agree with your assessment of handling. Yes they handle differently at low speeds and follow bumps and contours of the road but once above 40-50kph they do just fine. And they have amazing wet and dry grip .

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The assessment is based on the design of the tyre, Bike tyres have a rounder profilw as compared to an almost squarish cut section of car tyres. but if you have already tried that then good enough.

**The Monk** · 06-30-2015, 04:17 PM

re: Dustom's Turbocharged Harley 1250

^^^ A good read for you - The Dark Side

**dustom_99** · 06-30-2015, 04:42 PM

re: Dustom's Turbocharged Harley 1250

Originally posted by The Monk View Post

^^^ A good read for you - The Dark Side

Good read indeed! Thanks for sharing!

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**[email protected]** · 07-01-2015, 09:29 AM

re: Dustom's Turbocharged Harley 1250

Some pics please?

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**theironhorse99** · 07-01-2015, 09:35 AM

re: Dustom's Turbocharged Harley 1250

Originally posted by dustom_99 View Post

Now no more motorcycle tire. Going to use Michelin eagle 195/55 or sum thing like that. Will try to run a ventilated disk and a big ass calliper from car as well. Rear brakes need more stopping power for sure now

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riding it along the curves will be an issue sirjee also it will eat off you t-stem ball racer bearings sooner than its supposed to.
a super flat rear with a standard 110/120 rounded front will be a mismatch will cause unwanted issue. cupping and hydroplaning at high speeds.

would like to know your pointers on these..

**dustom_99** · 07-01-2015, 10:22 AM

re: Dustom's Turbocharged Harley 1250

Originally posted by theironhorse99 View Post

riding it along the curves will be an issue sirjee also it will eat off you t-stem ball racer bearings sooner than its supposed to.
a super flat rear with a standard 110/120 rounded front will be a mismatch will cause unwanted issue. cupping and hydroplaning at high speeds.

would like to know your pointers on these..

Half of the fun is finding out! So let's find out.
I understand that there may be some apprehension about handling issues but how is steering stem bearing life related to it?

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**theironhorse99** · 07-01-2015, 10:43 AM

re: Dustom's Turbocharged Harley 1250

Originally posted by dustom_99 View Post

Half of the fun is finding out! So let's find out.
I understand that there may be some apprehension about handling issues but how is steering stem bearing life related to it?

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while you take turns or lean either side. the bike will wobble if left free hand. if you hold the handles as in normal riding conditions to counter it the whole pressure is indirectly going to the roller bearings on the t-stem. and this is one thing i can guarantee you that will wear out if tires are a mismatch. Also t-stem roller bearings are one of the most important parts of handling as its a sole point which connect the frame to rest of the front.

logical scenario.. a perfectly aligned motorcycle will have both wheels running in single line without any deviation. while you corner the line still remains intact and thinner tyres provide good cornering sacrificing some traction. now with a super wide rear while you in straight line. it will work out just fine but while you lean or corner the car tyres dont have a curved surface like motorcycle tyres hence while your front tries to lean the rear will resist it due to the design.

its like twisting the whole frame and guess where the whole force goes ?? the coneset ( t-stem bearings) as its single contact between front tyre and rear.

also car tyres are curved at sharp angles due to usage while you go into hard corners or exiting they will push too hard to either corner on side or get back to straight. its gonna be risky. you may try it but don't corner with that thing. it can be fatal. its a request.

**dustom_99** · 07-01-2015, 10:55 AM

re: Dustom's Turbocharged Harley 1250

Originally posted by theironhorse99 View Post

while you take turns or lean either side. the bike will wobble if left free hand. if you hold the handles as in normal riding conditions to counter it the whole pressure is indirectly going to the roller bearings on the t-stem. and this is one thing i can guarantee you that will wear out if tires are a mismatch. Also t-stem roller bearings are one of the most important parts of handling as its a sole point which connect the frame to rest of the front.

logical scenario.. a perfectly aligned motorcycle will have both wheels running in single line without any deviation. while you corner the line still remains intact and thinner tyres provide good cornering sacrificing some traction. now with a super wide rear while you in straight line. it will work out just fine but while you lean or corner the car tyres dont have a curved surface like motorcycle tyres hence while your front tries to lean the rear will resist it due to the design.

its like twisting the whole frame and guess where the whole force goes ?? the coneset ( t-stem bearings) as its single contact between front tyre and rear.

The explanation seems logical and I agree!
If I burst bearing after bearing , I might consider changing them to tapered roller bearings.
I had run eagle f1 225 in my diesel bike as well as Zen engined bike, and both of them had steering stem from Yamaha fz. I had combined and welded together two lower triple tree clams together to make it twice as robust and was running NBC tapered roller bearing on top as well as bottom.
I all of about 1600 km covered on both bikes , I did not feel bikes lacked cornering ability , just that it requires more user input on handle bar( counter steer) but at the same time coming out of corner and powering up is easier as the motorcycle stands upright as soon as user input is removed.
I felt bike hugged the line beautifully on twisty sections and never the rear felt out if control.
So let's wait and see! Nothing like having a different me motorcycle than everyone else.
No one is gonna ask for a test ride for sure and its little less heartbreak saying no to friends for me!

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**theironhorse99** · 07-01-2015, 10:59 AM

re: Dustom's Turbocharged Harley 1250

Originally posted by dustom_99 View Post

The explanation seems logical and I agree!
If I burst bearing after bearing , I might consider changing them to tapered roller bearings.
I had run eagle f1 225 in my diesel bike as well as Zen engined bike, and both of them had steering stem from Yamaha fz. I had combined and welded together two lower triple tree clams together to make it twice as robust and was running NBC tapered roller bearing on top as well as bottom.
I all of about 1600 km covered on both bikes , I did not feel bikes lacked cornering ability , just that it requires more user input on handle bar( counter steer) but at the same time coming out of corner and powering up is easier as the motorcycle stands upright as soon as user input is removed.
I felt bike hugged the line beautifully on twisty sections and never the rear felt out if control.
So let's wait and see! Nothing like having a different me motorcycle than everyone else.
No one is gonna ask for a test ride for sure and its little less heartbreak saying no to friends for me!

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i sure do remember the "falcon" keep sharing videos to my friends telling how some epic guy made some serious epic ride...
if you have already experimented then go ahead. i would wait for the outcome as one amazing guy experiment things opens up doors for others.
i suggest what i could understand from all the years of riding and issues and outcomes but open to newer dimensions and mods. keep us posted sir

**The Monk** · 07-01-2015, 11:35 AM

re: Dustom's Turbocharged Harley 1250

Not exactly car tyres, but these 300mm tyres on the 'Busa make it feel pretty darn flat and difficult to turn. At least initially. Once you get comfortable with it, then you forget that the rear is oversized.

Of course rider skill is also important, as one guy, the mechanic who sees to the bike, wasn't technically sound and so didn't quite understand the concept of counter-steering. As such he was slowing down at turns to walking speeds and speeding up once he hit the straights.

Active counter steering through the corner is essential when using such wide tyres. I assume a car tyre that Dustom plans to install will have similar handling characteristics!

A couple of pictures of what i am talking about -

**theironhorse99** · 07-01-2015, 12:31 PM

re: Dustom's Turbocharged Harley 1250

Originally posted by The Monk View Post

Not exactly car tyres, but these 300mm tyres on the 'Busa make it feel pretty darn flat and difficult to turn. At least initially. Once you get comfortable with it, then you forget that the rear is oversized.

Of course rider skill is also important, as one guy, the mechanic who sees to the bike, wasn't technically sound and so didn't quite understand the concept of counter-steering. As such he was slowing down at turns to walking speeds and speeding up once he hit the straights.

Active counter steering through the corner is essential when using such wide tyres. I assume a car tyre that Dustom plans to install will have similar handling characteristics!

A couple of pictures of what i am talking about -

unlike these tyres which are rounded along the curve the car tyres curve at 70-90 angles. which give amazing feedback in straight line stability and super awesome traction but way off for cornering as it will run on edge while doing so. here is what i mean is the angle while turning. even super wide motorcycle tyres curve gradually.

**dustom_99** · 07-01-2015, 02:17 PM

re: Dustom's Turbocharged Harley 1250

https://youtu.be/xaIj1XrmvLM

Never on side walls!
Currently car tyre is not even on my worry list! Foot clutch will require learning to ride all over again, specially in Indian traffic.

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**The Monk** · 07-01-2015, 02:21 PM

re: Dustom's Turbocharged Harley 1250

Have seen this video and was looking for it. Couldn't find it so put up the busa pictures

Apologies if you have already answered this, but why the foot clutch?

**dustom_99** · 07-01-2015, 02:26 PM

re: Dustom's Turbocharged Harley 1250

Originally posted by The Monk View Post

Have seen this video and was looking for it. Couldn't find it so put up the busa pictures

Apologies if you have already answered this, but why the foot clutch?

Same answer as - why a motorcycle!

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