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Author Topic: Texas Two Step Taco  (Read 6623 times)

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #20 on: Oct 03, 2018, 21:52:53 »
Was lucky running a wasted spark? (is that an induction tach?)
If not then it’s giving you double the RPM.
Awesome! Yes this was on Victoria and we were running wasted spark. Teazer gave us that tach so that is why it is lucky...our redline is 6500 on the Taco so this will work just fine! lol!


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It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #21 on: Oct 04, 2018, 06:49:39 »
So it looks like the Firestone 2.75 by 21.00 Ribbed Firestone is all show and no go.  Looks like I need to get rid of this bias...ply! The 2.75 by 21.00 Ribbed Firestone is not speed rated and some bias ply tires are only good for 65 mph.   So we have some choices and once again thankful for DTT.


https://www.bikebandit.com/tires-tubes/motorcycle-tires/avon-am6-speedmaster-motorcycle-tire/p/3324

It keeps with the vintage looks and is S rated

However we have learned that we scrubbed speed with a tire like this before when we ran a similar one on Victoria.


I am partial to this because I have AV’s on the Ducati 250. This tire is V rated and is quiet in a straight line.

https://www.jpcycles.com/product/210-230/avon-av71-cobra-mh90-21-front-tire


Maybe y’all have some other choices

The Kenda’s are appeal to my Dutch side because of price and they are H rated.

Trying to stay 80/90 by 21”

One other thing. The stock 21” akront hoop mated to the Bultaco hub is lighter than any other combination we have here around the shop.








Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #22 on: Oct 04, 2018, 07:11:02 »
That sure looks like a good time to me.
If you would be interested in sketching up the old and new flywheel dimensions, i’d love to get an accurate comparison of the two inertial moments.
Only if you’re interested.
The stock Bultaco Montadero flywheel weighs 8 lbs and is 5.35 inches in diameter and the width is 2.35”

The 6 lbs. lightened flywheel is 5.13” by 1.87”


Lynn Mobley is sending me a Pursang Flywheel that is just over 3 lbs.  Those measurements will be interesting.

This will be fun to test on the dyno and look at the torque curves.

Thank you!


Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline teazer

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Re: Texas Two Step Taco
« Reply #23 on: Oct 04, 2018, 12:20:31 »
What about something like this:

http://www.ignitech.cz/en/vyrobky/accessories/magneto/magneto.htm

https://www.electrexworld.co.uk/acatalog/STK-800.html

https://www.ebay.com/itm/Honda-Crf50-Pit-Bike-Outer-Rotor-Ignition-Stator-Magneto-BEATS-INNER-ROTOR-KIT/331263352137?hash=item4d20d59d49:g:BK8AAOSwirZTxrNH:sc:USPSPriorityMailPaddedFlatRateEnvelope!60060!US!-1

https://www.ebay.com/itm/INNER-ROTOR-KIT-CRF-XR-70-Z-50-TAOTAO-BAJA-COOLSTER-SDG-SSR-70-110-125-pit-bike/121142603046?epid=1262044036&hash=item1c34a96d26:g:iKUAAOSwpEdbUWzm

I would guess that similar units from Europe or Japan may be of better quality, but not a lot of sunk cost to try.  The other thing you would have to check is the advance curve which you don't want. 

Combine the ignitech magneto with an ignitech DCCDI race ignition and program it yourself with built in kill circuit........Or use it to drive an AC CDI black box of your own design.

The curve in that system from Electrexworld looks almost perfect for your application and it looks like PVL components.  They have others.

Lots of choices..
« Last Edit: Oct 04, 2018, 12:26:09 by teazer »

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #24 on: Oct 04, 2018, 12:37:11 »
And the winner is....the stock magneto and points or the Nova 2 electronic ignition?


Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #25 on: Oct 04, 2018, 12:48:48 »
What about something like this:

http://www.ignitech.cz/en/vyrobky/accessories/magneto/magneto.htm

https://www.electrexworld.co.uk/acatalog/STK-800.html

https://www.ebay.com/itm/Honda-Crf50-Pit-Bike-Outer-Rotor-Ignition-Stator-Magneto-BEATS-INNER-ROTOR-KIT/331263352137?hash=item4d20d59d49:g:BK8AAOSwirZTxrNH:sc:USPSPriorityMailPaddedFlatRateEnvelope!60060!US!-1

https://www.ebay.com/itm/INNER-ROTOR-KIT-CRF-XR-70-Z-50-TAOTAO-BAJA-COOLSTER-SDG-SSR-70-110-125-pit-bike/121142603046?epid=1262044036&hash=item1c34a96d26:g:iKUAAOSwpEdbUWzm

I would guess that similar units from Europe or Japan may be of better quality, but not a lot of sunk cost to try.  The other thing you would have to check is the advance curve which you don't want. 

Combine the ignitech magneto with an ignitech DCCDI race ignition and program it yourself with built in kill circuit........Or use it to drive an AC CDI black box of your own design.

The curve in that system from Electrexworld looks almost perfect for your application and it looks like PVL components.  They have others.

Lots of choices..
Talk to me about launching this Taco with a narrow torque curve. What kind of curve do we need for drag racing?


Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline teazer

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Re: Texas Two Step Taco
« Reply #26 on: Oct 04, 2018, 16:32:26 »
If those are your choices, go with stock points.  They work.  That Nova module is designed for a single magnet system according to one website selling them.

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #27 on: Oct 04, 2018, 16:43:55 »
If those are your choices, go with stock points.  They work.  That Nova module is designed for a single magnet system according to one website selling them.
I was just tinkering with it for fun wanted to see if it would work...The trials guys use them and an Australian company use to make the Atom https://pickersyard.weebly.com/atom-universal-electronic-ignition-module.html which had 3 different versions with different ignition curves.

I definitely think the stock points won that test.  I ordered the CRF50 internal rotor to tinker with.  I think paired with the air shifter it will be a fun ride.

Zeke got in the truck after school and said, “Dad guess what I learned about old people like you in Sociology class....People over 50 are bored and seek out new experiences.”  I said, “Son only the boring are bored.” Lol


Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #28 on: Oct 04, 2018, 18:06:40 »
It's possible that the slot is oversize already and if not, a sander will work. All it does is to locate the flywheel.

Are those tires speed rated by any chance?
Called M and H Tires technical support about their drag slick and I was wrong they are not speed rated. They told me that their drag tires are NOT speed rated but that they were the inventor of the Drag tire and we are good on a 1/8th or 1/4 mile....however they are not recommended for Bonneville. Mickey Thompson says that their non speed rated tires are good up to 85mph.


Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0

Offline Texasstar

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Re: Texas Two Step Taco
« Reply #29 on: Oct 05, 2018, 06:48:02 »
The Bultaco’s will run on timing that is 1mm to 4mm Before TDC.  I tinkered with the timing so much that I accidentally started it in reverse. Don’t do that because the Bull will kick you! This test was at 4mm BTCD.  Very snappy but the plug came back a little hot.  The book says it is suppose to be 3.3-3.5 for the Montadero and 3.00 to 3.25mm for the Bandido.   I am pretty sure timing in the Bultaco books are like the pavement markings in Italy...just suggestions. If you read the trials forums they pretty much set them for the throttle response they want.

Interesting note the 360 Pursang is 2.2-2.4 BTDC



I am looking forward to the internal flywheel ignition that is coming next week. Pulling off the flywheel is a pain to set the ignition.

We are taking the Taco to the dyno for the first time to see what we have. I have set the timing back to 3.5 mm BTDC.


Sent from my iPhone using Tapatalk
It's an optimization exercise and not a maximization trip.-Teazer


And though she be but little, she is fierce - WS
http://zoomwithzeke.com/
Third Times a Charm cb175
http://www.dotheton.com/forum/index.php?topic=66169.0

Honda Cb175 Victoria!

www.dotheton.com/forum/index.php?topic=52299.0

Honda Cb200 Lucky!
http://www.dotheton.com/forum/index.php?topic=45872.0

Bultaco El Montadero 360

http://www.dotheton.com/forum/index.php?topic=64349.0