Author Topic: BRIDGESTONE 100 TMX 1971. (Read 18502 times)

reed · « **on:** May 23, 2012, 07:00:05 PM »

Bridgestone 100 TMX.
I was going to replace the kick start shaft in my 90 sport.
But i think its time to replace the left crankcase that got
Damage on the TMX,and get the motor running right!
Thanks.
Steve.

reed · « **Reply #1 on:** May 23, 2012, 07:05:07 PM »

Bridgestone 100 TMX.
This is a picture of the new crankcase and the side cover.
The damage was done before i had the motorcycle i think
At one time the chain came off etc.
Thanks.
Steve.

reed · « **Reply #2 on:** May 23, 2012, 07:12:25 PM »

The Bridgestone has very little miles on it.
And i can not wait to ride it around.
Thanks.
Steve.

reed · « **Reply #3 on:** May 23, 2012, 07:15:47 PM »

One more picture of the Bridgestone before i remove the engine etc.
Thanks.
Steve.

reed · « **Reply #4 on:** July 15, 2012, 04:59:35 PM »

Bridgestone 100 TMX 1971.
Its time to work on my Bridgestone TMX 100.
With some of my work commitments out of
The way, i pulled the engine out of the frame.
So this week i will pull the engine apart and
I think new crankcase is in order along with
New mains and crankshaft seals and check
Out the top end etc.
Thanks.
Steve.

Mike Anderson · « **Reply #5 on:** July 15, 2012, 09:34:30 PM »

Hi Steve,

Mike Anderson · « **Reply #6 on:** July 15, 2012, 09:36:06 PM »

Hi Steve,
We just got home from our mission. Looks like you are making great progress as usual on the TMX. I am anxious to get started on mine. Another project, that's all I need. Talk soon.
Later Mike

reed · « **Reply #7 on:** July 16, 2012, 10:18:29 PM »

I pulled the TMX engine apart today it needs new crank seals and bearings.
Richard has new piston and rings in stock and i think i will replace the clutch
Plates they have a hard life in small engines same goes for pistons and rings
Etc,i will say this Bridgestone engines are well made, in the picture i am using
A puller to split the crankcases.
Thanks.
Steve.

reed · « **Reply #8 on:** July 16, 2012, 10:21:45 PM »

This is a picture of the crankcase apart etc.
Thanks.
Steve.

reed · « **Reply #9 on:** July 16, 2012, 10:29:45 PM »

Oil pump gear B part number 1552-5010 just starting to split as you can see in the picture.
Got that in time!

Thanks.
Steve.

reed · « **Reply #10 on:** July 18, 2012, 09:12:50 PM »

The piston is in good shape the lower ring is stuck that's why the compression is low
Its not worth cleaning up the piston, the price for a new piston and rings is very reasonable.
And the bore is in condition, more parts from Richard!!
Thanks.
Steve.

reed · « **Reply #11 on:** July 18, 2012, 10:28:19 PM »

If you are replacing points or crankshaft oil seal it would be a wise move to get the Bridgestone fly wheel puller.
I know you can make one, but this puller is well made and low cost to buy.
Thanks.
Steve.

reed · « **Reply #12 on:** July 19, 2012, 09:03:16 PM »

The clutch plates are worn so i will be replacing in a set.
Most of the time if the rear shocks are worn you will need.
Clutch plates too much weight on the motorcycle or maybe
Doing jumps anyway time to order,the crankshaft big end
Bearing is in good shape and the con rod, its coming together.
Thanks.
Steve.

reed · « **Reply #13 on:** July 19, 2012, 09:13:23 PM »

On the fly magneto i will be replacing points and condenser.
Check out how somebody wired the condenser i had no
Spark looks like to much heat applied to the condenser.
Thanks.
Steve.

Mike Anderson · « **Reply #14 on:** July 19, 2012, 09:23:13 PM »

Hi Steve,

Great pictures nothing like a good do it your self photo set to get you thru a rebuild. I will use these pictures when I am rebuilding my TMX. Thanks for all you do.
Later Mike

OldSwartout · « **Reply #15 on:** July 20, 2012, 09:59:51 AM »

Quote from: reed on July 18, 2012, 09:12:50 PM

The piston is in good shape the lower ring is stuck that's why the compression is low
Its not worth cleaning up the piston, the price for a new piston and rings is very reasonable.
And the bore is in condition, more parts from Richard!!
Thanks.
Steve.

Save that old piston and rings. Richard has replacements reasonably priced now, but 20 years from now, when those are gone, people will be paying big bucks for salvageable used ones.

reed · « **Reply #16 on:** August 07, 2012, 09:33:13 PM »

Bridgestone TMX 100.
With other workshop commitments this is the stage i am at now with the TMX.
Crankcases back together new main bearings and seals etc.
Thanks.
Steve.

disc_valve · « **Reply #17 on:** August 10, 2012, 06:49:04 AM »

That split plastic oil pump gear is a little worrying. Is that a known fault with these bikes? When I restored my own TMX it had only done 516 miles from new so the gear was OK, but is it a good idea to take the cover off and check the gear occasionally.

Also, how about the 350 engine - that uses a similar plastic gear to drive the oil pump?

Graham

william anderson · « **Reply #18 on:** August 10, 2012, 08:22:54 PM »

HI , disc valve , i have also done a tmx100 an the gear showed some split area in the gear , the bike had about 2100 miles , an a tmx i got for parts from mike was also starting to split , the taka i bought new in 72 , after a year of use i had to replace the clutch friction plates an while in there i noticed the gear was showing so stress at this point , , i think this was a weak point , thanks william

reed · « **Reply #19 on:** August 11, 2012, 09:53:07 PM »

On the plastic oil pump gear subject, i think it would a good thing to check out the gear.
I have seen this on other models like Yamaha and Kawasaki with splits showing etc.
Thanks.
Steve.

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Author Topic: BRIDGESTONE 100 TMX 1971. (Read 18502 times)

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