Father Son 75 CB200T Rise From the Ruins

[Texasstar]

Nice progress. BTW a KR series tire is much wider than the numbers suggest. They used to overhang the rim and were pretty wide, but you probably noticed that. That was how they made fat tires for skinny rims back in the day.

For example a KR76 in 2.75-18 is actually around 80mm wide and a 3.0 is around 85mm wide. KR83 3.25-18 is around 110mm wide which is closer to 4 inches. That's according to the records I took of a whole bunch of race wheels that passed my way many years ago.

Of course the KR series were the first triangular or Trigionic (sp?) ties and had low rolling resistance (skinny upright) and a large contact patch when all the way over. The closest street tie is probably a K81R/TT100 in a skinny size or a KR825.

this is what I noticed...a small contact patch...like gollum with his precious I was enamored. The Michelin Gazelles have a huge contact patch. Nobody wants to answer, "hey how big is your contact patch?" That question is very awkward with the opposite sex So we are testing tires starting with the budget minded racing tires. The Sava's also have slicks. The next step up from the MC-11's is MC-7 is the same size as the gazelles but have a higher speed rating than both the Gazelles and MC11 and a higher load rating. i am testing the boundaries but will make sure Zeke is on the safest tires for his speed runs one day.

All I know is the riders of that little two stroke rocket 125 @150mph had major balls...and they weren't 6'5" 220

The front tire on that Morbidelli 125 was 2.0 and the rear was 2.25...
The Kr825 is an amazing tire, modern race compound, way lighter than a set of equivalent Avons...Dunlop's history wanted to kick the competitions butt from the beginning also and we have them to thank for the pneumatic tire...when everyone was running on wood wheels one guy dared to be differ

 

[Texasstar]

Just an observation but it seems our mikunis are running better on the shorter pipes??? They warm up faster and aren't as temporalmental at low Rpms...

 

[teazer]

............... They warm up faster and aren't as temporalmental at low Rpms...

It's all a matter of timing......................

The smaller Hondas and Suzukis were Tempuramental.

125 jockeys back in the day were typically around 5'2" or so and I'd guess around 100 pounds. Teeny tiny guys with big b..s.

BTW, not that it's an issue for you two, but 825 is very slippy in the wet compared to race Avons. Better in the dry but in the wet, not so much.

 

[Texasstar]

thank you gentlemen we have broke through the wall in 5th...and climbing...ran out of road...and this is not the road. This road is slightly uphill and has no junctions for people to pull out in front of us..fields to the left and right so I can see animals...braking is horrible so we are trying to plan accordingly. We have the cl160 front hub that we are thinking about mounting...but for an all out speed run we are removing the front rotor....saves 4 lbs and front brakes are not allowed at bonneville.

 

[Texasstar]

22" Short pipes...huge drop off in torque...
http://youtu.be/smsLZzvDgRU

 

[clem]

I'm really digging that fairing and the time put into the bike performance wise.

 

[Texasstar]

I'm really digging that fairing and the time put into the bike performance wise.

thanks Clem!

 

[Texasstar]

It's all a matter of timing......................

The smaller Hondas and Suzukis were Tempuramental.

125 jockeys back in the day were typically around 5'2" or so and I'd guess around 100 pounds. Teeny tiny guys with big b..s.

BTW, not that it's an issue for you two, but 825 is very slippy in the wet compared to race Avons. Better in the dry but in the wet, not so much.

thanks Teazer I was 6'4" and 150 once upon a time...

 

[Floegstad]

that faring looks killer guys. love it

This was really enjoyable reading Tex.
I am trying toget my 8 year old son to join me swinging some wrenches on a old xr 90 i traded a while back,but he just want to move dirt on his ktm 50sx.. :
But with time and colder weather i hope he`s moving in to the garage with me...

 

[Dragon Soaring]

Do you have a running total for this project - I want to know what NOT to tell my wife

 

[Texasstar]

Do you have a running total for this project - I want to know what NOT to tell my wife

i do have a total. But I'm not going to tell you so that I can give you plausible deniability. But what I will give you is a question. What is the education of our child worth?

 

[Texasstar]

This was really enjoyable reading Tex.
I am trying toget my 8 year old son to join me swinging some wrenches on a old xr 90 i traded a while back,but he just want to move dirt on his ktm 50sx.. :
But with time and colder weather i hope he`s moving in to the garage with me...

floegsted.
The thing is with my son is it was his idea not mine. You can't make your passion someone else's passion I made that mistake with my oldest. The key is to find what direction THEY are going and go with it.

 

[Floegstad]

He has grown 2 tall for his ride,so i guess with time and some visions on how the other bike of his can be with some tlc from him and me might do the trick,but i`m not pushing him into anything.
He is more of a rider than a wrencher....hehehe
He got his first mx at 4 yrs old and spending atleast 3 evnings pr week on it,so i am happy with the way things are anyways!
He`s like a 4.5 ft daredevil with full throttle if possible....(sky is the limit)
The most important is that he loves bikes his own way....

 

[Texasstar]

He has grown 2 tall for his ride,so i guess with time and some visions on how the other bike of his can be with some tlc from him and me might do the trick,but i`m not pushing him into anything.
He is more of a rider than a wrencher....hehehe
He got his first mx at 4 yrs old and spending atleast 3 evnings pr week on it,so i am happy with the way things are anyways!
He`s like a 4.5 ft daredevil with full throttle if possible....(sky is the limit)
The most important is that he loves bikes his own way....

very cool!

 

[Texasstar]

Meet Bryan Hobbs of HobbsRaceCraft...http://www.hobbsracecraft.com/ This guy is a perfectionist. We met Bryan at several of our Hood New Years Eve parties. Zeke and I got to visits his shop yesterday. Check out the new induction box for this record setting 2 stroke.

 

[Texasstar]

Bryan has built exhaust systems for Bonneville cars to drag bikes. He said that finding the right combination comes down to testing,
testing, and testing. He also said while we may need pulse volume for the street...Bonneville is a different beast and we
Will need a more balanced torque curve
to get us there... once again we are told it comes down to optimization. Bryan offered to build us some collectors to use on the Dyno. He also has had to find creative ways to tuck pipes that are a lot longer than what you would expect. Google his name and you will
See he is given accolades by the drag bike community.
http://www.dragbike.com/forum/showthread.php?58539-Hobbs-Racecraft

 

[Floegstad]

The engine in that dragbike is it a one of a kind build?
I can get my hands on a polaris predator 800ccm snowmobile engine that would be a blast to install in a early 80`s gsx 1100 frame that lives behind my garage for the past 5 years.
There´ssomething special about massive 2 stroke power 8)

 

[teazer]

Is that Bill Baxter's H2 Super Eliminator national record holder by any chance?

 

[Texasstar]

Is that Bill Baxter's H2 Super Eliminator national record holder by any chance?

teazer it may well be..by luck

 

[Texasstar]

We are testing the rolling resistance of our stock wheel bearings and the michelin gazelles 2.75 x 18 on front and 3.0 x 18 on back. We did two tests with Zeke going 25 and pulling in the clutch and coasting. Tomorrow we will mount the Sava MC-11'and test them.

512 feet 25mph to 0
26psi front
28psi back

Lucky just broke her first record
1098 feet 25mph to zero
39 psi
36 psi
Sava mc-11 2.50 x 18
And all balls bearing in the rear wheel kept the stock one on front but removed the rotor.