Melted Spur Gear Question

csp1971

Well-Known Member
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1,664
Location
Missouri
I know this has been discussed into the ground (over at hpibajaforum and a little bit here), but I need some sort of additional reassurance....

I run a Baja with everything stock (except for an X-Can). Today, I melted a spur gear.

Any reason why this would happen? I am only on my 6th tank through this thing. I run with the gear cover on.

I was running through 2-3 inch tall grass and jumping a few feet in the air (onto grass). Could the taller grass overheat the clutch/pinion to cause the spur to melt? I'm guessing that was it because it was running like a bat out of hell until the last jump.

One more question, should I just replace the plastic spur with the Robinson steel spur gear?

I am going to replace the plastic carrier with the billet clutch bell carrier sometime this winter, the clutch bell with the turtle steel clutch bell, and the turtle billet diff saver. Anything else I should look at getting besides a pinion heatsink? I'm not looking for more speed from this thing, I love the way it runs as is.
 

csp1971

Well-Known Member
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1,664
Location
Missouri
Here's some additional info with pics. I decided to put a new spur on, should I get this much movement in the crankshaft?

Normal (or at least I think it is):

baja2.jpg


when I push the pinion out:

baja1.jpg
 

csp1971

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1,664
Location
Missouri
Bearings are there (I can see the rear bearing). I could NOT get that damn pinion bolt out to save my life. I used a torch to heat it up for a few seconds. No luck. I don't have the extra spur gear any longer that they suggest in the instructions so I guess I'll need to order some parts...dangit. The clutch shoes are perfect and everything there is fine.
 

Timmahh

Bajastafarian Madnes
PLUS member
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3,376
Location
Michigan
fwiw, i toasted spur number 2 and 3 last weekend in the sand pit.

it was quite rough and alot of bouncing while on throatle. so everytime the assend would plant itself in teh soft sand and hook up the spur went.

had 3 total gone for a day of bashing between 3 of us
 

csp1971

Well-Known Member
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Location
Missouri
I'm thinking about those RR steel spur and pinion. How do you think that those will do with a stock 23 and X-Can? People over on HBF seem to really like them.
 

Timmahh

Bajastafarian Madnes
PLUS member
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3,376
Location
Michigan
lol. i ve been thinking about a stock steel RR spur, but i know once i do that instead of a 6.00 spur i ll be replaceing the 23.00 driveshafts.

for the moment im gonna order 3 more stock spurs.

really though, i don't think 3 spur gears in 16 months is bad at all.
 

csp1971

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1,664
Location
Missouri
I didn't think about that. Maybe I'll stick to the stock spur for a bit longer. I'll be running less in the winter. 3 in 16 months is nothing. That's a little more than 1 dollar per month! :)
 

csp1971

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1,664
Location
Missouri
Well an update: I bought a couple extra spur gears and a new heavy duty 18t pinion. Took off the old pinion and put on the new. The slop that was there is now gone. I wonder if that other was never gripping the clutch bell all the way? I guess I'll never know. Anyway, slop gone, and going out for probably my last run of the year. Expecting my new son any day now so my time is running out! Sad about the limited Baja time, but excited about the new baby (the only thing in the world that smells better than a new baja!, I know, that's a bold statement). :)
 

csp1971

Well-Known Member
Messages
1,664
Location
Missouri
What a difference the 18 tooth pinion made with the X-Can. Seemed like I gained a few mph's!
 
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