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Old 09-15-2017, 04:53 PM
Sledgehans Sledgehans is offline
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Default Reverse?...

Hey just looking for some insight on adding reverse to my R1 buggy I'm building. I've seen the premade reverse setups but I'm not spending 1800$ on one.
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Old 09-15-2017, 05:20 PM
mckutzy mckutzy is offline
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Gearboxes, multiple forward's and/or reverse, aren't cheap... Or they're crap....
Now they range in price, a number have been mentioned around $500(I faintly recall), to really expensive...
Overall, no easy way around it...
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Old 09-15-2017, 05:36 PM
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Somebody once suggested using an electric starter motor for reverse.
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Old 09-15-2017, 05:51 PM
mckutzy mckutzy is offline
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I have said that a few times... Kinda forgot about this method.
Some 4wd buggy drivers have an electric reverse setup... I'm not entirely sure why, but I think it's a transmission issue...

They Use a starter and a flywheel on the diff...
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Old 09-15-2017, 06:04 PM
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Quote:
Originally Posted by mckutzy View Post
I have said that a few times... Kinda forgot about this method.
Some 4wd buggy drivers have an electric reverse setup... I'm not entirely sure why, but I think it's a transmission issue...

They Use a starter and a flywheel on the diff...
It's a transmission issue. F/R gearboxes that can handle 100 or more horses tend to be very expensive, heavy and hard to come by. Since bike engines already typically have 6+ gears it would be redundant and excessively heavy. The starter motor type reverse is simple and inexpensive, and enough to back down off a trailer or out of a bad corner.
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Old 09-15-2017, 06:18 PM
mckutzy mckutzy is offline
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Right... That's it... They typically use bike engines....
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Old 09-15-2017, 08:40 PM
Bbqjoe Bbqjoe is offline
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Some of the bigger bikes out there, such as a Goldwing I think, have a reverse using the starter motor.
It'd be kinda dumb to lug around a battery and starter motor just to back up.
That's what your friends are for.
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Old 09-15-2017, 10:06 PM
MTNSleder MTNSleder is offline
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If that R1 motor is a 2 stroke with electric start it can be Jerry Rigged to run backwards. Most 2 stroke motors will run in the opposite direction there for giving you reverse.. I don't know what a R1 motor is but is sounds like and looks like a two stroke to me..

My Sled runs backwards that's how I Know


---------- Post added at 09:06 PM ---------- Previous post was at 09:03 PM ----------

Here ya go, These Idiots will do a demonstration

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Old 09-16-2017, 07:08 AM
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Quote:
Originally Posted by MTNSleder View Post
If that R1 motor is a 2 stroke with electric start it can be Jerry Rigged to run backwards. Most 2 stroke motors will run in the opposite direction there for giving you reverse.. I don't know what a R1 motor is but is sounds like and looks like a two stroke to me..

My Sled runs backwards that's how I Know


---------- Post added at 09:06 PM ---------- Previous post was at 09:03 PM ----------

Here ya go, These Idiots will do a demonstration


Yeah 2 strokes will run either direction, but that's not exactly the approach you want to use for adding reverse to a buggy.

Reverse rotation used to be a big problem for old tractors with 2 stroke diesels. If you stall out climbing a hill in too high a gear and don't get the clutch in quick enough, the engine will reverse rotation and send you flying down the hill backwards.
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Old 09-16-2017, 07:43 AM
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R1 as in Yamaha R1! (YZF-R1 that is)

a one liter (998cc) four stroke engine with up to 200 hp (yes, twohundred indeed)
on a bike weighing less than 200kg (440 lbs)
yamaha managed to make a bike with one horse per kg (and put some horses on top over the years)

great bike, feels like you kicked in warp drive if you turn that throttle too eagerly

aaaanyways, nooo not a 2 stroke.

electric reverse !
starter motors usually come with a one way clutch already,
just mount a sprocket to it, get it in contact with the chain (not the direction of the 1way clutch of course!)
and hook up a battery with a switch and you'd basically be done.

'sid
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Old 09-16-2017, 09:35 AM
MTNSleder MTNSleder is offline
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Quote:
Originally Posted by itsid View Post
R1 as in Yamaha R1! (YZF-R1 that is)

a one liter (998cc) four stroke engine with up to 200 hp (yes, twohundred indeed)
200 hp really? That's all its got

Ahy OK its a 4 stroke thanks...
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Old 09-18-2017, 10:08 AM
Sledgehans Sledgehans is offline
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Yeah I've heard of the started methid and was thinking about it. Just don't want to end up in a get out and push this 1000lb kart backwards situation if it can be avoided. The starter thing doesn't look too bad so maybe I'll go that route.
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