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Ace 90 dirtbike build

Posted: Mon Nov 23, 2020 7:11 am
by Dale
I was not going to build any new ones this winter but somehow this thing just showed up in my shop. I swear, these things are just like Jack rabbits!

What you see is everything that it came with. Let's see, there is an Ace90 motor in a box on the shelf. Label says it runs. An Ace 90 pipe is hanging from the rafters. Tank? Check. Guess I'm building an Ace 90 this winter. Just can't say no...

Clarence, Where would frame number A95xx put this for a build date?
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Came with a rare sprocket carrier to store the overlay sprocket. Cool!
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Re: Next project? Ace 90

Posted: Mon Nov 23, 2020 9:50 am
by matt glascock
Groovie. Any particular direction with the build? Cool to see the stock bars.

Re: Next project? Ace 90

Posted: Mon Nov 23, 2020 1:29 pm
by Dale
matt glascock wrote: Mon Nov 23, 2020 9:50 am Groovie. Any particular direction with the build? Cool to see the stock bars.
Goal will be another solid running dirt bike with grandchildren in mind. Last winters Ace100 dirt bike build was a big hit. Might as well have 2 of them.

The stock bars were a surprise especially since they are not bent. But... I hate them and have already removed them. I will keep them as a backup for my street legal Ace 90 and model 92 Ace 100.

Re: Next project? Ace 90

Posted: Mon Jan 18, 2021 10:15 am
by Dale
Good utilization of a little winter sunshine.

Destined to be a gloss black Ace 90 dirtbike.
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Re: Next project? Ace 90

Posted: Tue Jan 19, 2021 9:25 am
by dirty_rat
Is that an attempt at a sissy bar on the back???

Re: Next project? Ace 90

Posted: Tue Jan 19, 2021 9:42 am
by viclioce
Dale. I have a 90 to do as well. Going to do the same thing! Clean it up & make a dirt bike out of it! I’ll start on it when I’m finished with the second Rat!

I’m going to send the handle bars off for re-chroming. Any recommendations, and what should I do with them prep wise before sending? Thx! :ugeek: Victor

Re: Next project? Ace 90

Posted: Tue Jan 19, 2021 12:42 pm
by Dale
dirty_rat wrote: Tue Jan 19, 2021 9:25 am Is that an attempt at a sissy bar on the back???
Not sure what you are seeing as a sissy bar, but that is Sissy working the sand paper with her brother... :D
Today they helped me break down the tires and wheels for a thorough cleaning.

Re: Next project? Ace 90

Posted: Tue Jan 19, 2021 12:45 pm
by Dale
viclioce wrote: Tue Jan 19, 2021 9:42 am Dale. I have a 90 to do as well. Going to do the same thing! Clean it up & make a dirt bike out of it! I’ll start on it when I’m finished with the second Rat!

I’m going to send the handle bars off for re-chroming. Any recommendations, and what should I do with them prep wise before sending? Thx! :ugeek: Victor
Victor,
I have never had anything chromed or plated so can not advise on that. I am sure others here can help with that.

Re: Next project? Ace 90

Posted: Wed Jan 20, 2021 8:09 am
by dirty_rat
The photo of the rolling frame, the rear fender stay is sticking up above the rear rack. It looks almost like an old school chopper sissy bar.

Re: Next project? Ace 90

Posted: Wed Jan 20, 2021 8:19 am
by Bruce Young
Victor re-chroming bars and other items, no need to do anything that's part of the price. they will pre-chrome everything in chemical baths. Since you are going to do the bars look around and make sure there may not be anything else you might need to be re chromed, The chrome-rs might give a little disc. with more items to do. Just say in. Bruce

Re: Ace 90 dirtbike build

Posted: Wed Feb 10, 2021 8:13 am
by Dale
Making progress. Needing warmer weather to finish painting and then ready for assembly. Finished the exhaust pipe this week. It is a flamethrower built from a 94 Wombat married to an Ace 100 B+ header. Flamethrowers are synonymous to Hodaka for me...
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Time to tackle the motor. This is a fairly early build with number P2026 out of 17380 built. It was an Ebay purchase a number of years back. Condition unknown.

Compression is good and leak down test was steller. Spark? Yes. Piston viewed from exhaust and intake looks new. I will be replacing the left crank seal with a fresh one and then run it as is. But... what the heck is this? Is this common on earlier builds? A rubber block insert in the partition between the magneto cavity and the countershaft cavity. Running behind this block is the magneto ground wire which is connected to the case within the countershaft cavity.
???
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Re: Ace 90 dirtbike build

Posted: Wed Feb 10, 2021 8:28 am
by taber hodaka
Dale those early 90 coils, were not the most reliable. Clarence

Re: Ace 90 dirtbike build

Posted: Wed Feb 10, 2021 8:38 am
by Dale
taber hodaka wrote: Wed Feb 10, 2021 8:28 am Dale those early 90 coils, were not the most reliable. Clarence
Thanks. I've wondered about that and thought I'd replace it with a coil mounted under the tank. I haven't researched it yet but guessing that you would need to replace this ignition coil with an exciting coil?

Re: Ace 90 dirtbike build

Posted: Sun May 16, 2021 12:35 pm
by Dale
The finished project! The Ace 90 dirtbike is ready for some summer fun.

I installed the seat foam and cover today as the last step. The model 93 saddle with a flamethrower exhaust and high front fender make the perfect Hodaka to my eyes.

Many thanks to Terry Larson for producing the new foam and covers. No small deal! Not to mention a long list of miscellaneous bits and pieces also acquired from Hodaka-Parts.com. Thank you Terry!
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Re: Ace 90 dirtbike build

Posted: Sun May 16, 2021 2:13 pm
by givergas
very nicely done ,looks awesome

Re: Ace 90 dirtbike build

Posted: Sun May 16, 2021 3:48 pm
by matt glascock
What a cool bike. Nice Dale!

Re: Ace 90 dirtbike build

Posted: Sun May 16, 2021 4:22 pm
by viclioce
Wow! You moved way ahead of me! I’m almost done. Got the motor in the frame and polished out the old cases after removing the paint which was in pretty bad shape.

Seat can back from the upholstery shop! Getting good spark from the original coil on the stator. Just had to trim the wire & add another plug cap to it!

I ordered all the parts I needed for the carb, except one. The W clip to lock the needle in place on the slide. Ordered it yesterday. Should ship tomorrow!

Tomorrow, I’ll install the OEM pipe because it cleaned up really nice. All that’s remaining is the tank. I may add some paint to the tank. Need to get some pin stripe tape to lay out the pattern. Then we will see how it goes! :ugeek: Victor

Re: Ace 90 dirtbike build

Posted: Mon May 17, 2021 7:17 pm
by matt glascock
Really nice bike, Dale. Could you give a bit of detail on how you modified the pipe?

Re: Ace 90 dirtbike build

Posted: Tue May 18, 2021 4:44 am
by Dale
matt glascock wrote: Mon May 17, 2021 7:17 pm Really nice bike, Dale. Could you give a bit of detail on how you modified the pipe?
Thanks Matt!
This build was another low budget affair using the roller that was given to me and other parts that I had hanging in the rafters. Among those parts was a model 94 Flame thrower pipe that was in pretty good shape except for missing several inches that had been cut off at the exhaust nut.

The 125cc flame throwers are different from the 100cc version. The most obvious difference is the at the outlet of the pipe. The 125 is squared off and the spark arrestor sticks completely out of the pipe. The 100cc pipes are finished with an angle and the spark arrestor is partially shrouded by the pipe. The headers are also different with the 100cc being smaller in diameter and the bends are different. I was looking at fabricating a new header section when I recalled a friend talking about a pipe piece that he had. Turns out he had the complete header to a 100cc flame thrower! A parts trade was made.

I cut the complete header off of the pipe at the welded seam. It took some fiddling with the angles, but with some determination I settled on the angle (using duct tape of course!). I then marked up the pipe for alignment and took it to my local welder.
100 cc header section
100 cc header section
final fitment
final fitment
My wife takes better pictures than myself...
My wife takes better pictures than myself...

Re: Ace 90 dirtbike build

Posted: Tue May 18, 2021 11:36 am
by matt glascock
Well how da ya like that! A bud who just happens to have a 100cc flame thrower header laying around? I'd say you hang with a cool crowd. Very clever pipe mod. It looks nicely tucked in at the knee level - maybe more effectively than stock. Very clever build. Inspires me to never EVER throw Hodie parts away. Thanks for sharing.