Big Gun (big bore)#1

6/28/2013 4:40pm Edited Date/Time 11/13/2020 8:03pm
All caught up on projects, closed the shop until fall

Working on the final timing specs, front fork settings, oil
Weight , volume

Has anyone purchased an Ohlins shock, with a short hose
Resevoir set-up from a reputable dealer that works on the
RM465-500

Suzuki RM465 - pumped up to just under 540cc
Out for some testing at the remote Arkansaw mx track
In Wisconsin , modern style track(supercross size jumps).

The track in empty
2
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Matt Fisher
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3947
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Location
Visalia, CA US
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1084th
6/28/2013 6:27pm
Nice looking bike.
Given that power was never lacking on big bore 2 strokes, why the overachiever displacement?
6/29/2013 7:56am
I have built 3 engines for this bike, with Suzuki parts hard to find

Yamaha YZ465-490 con- rods fit the suzuki crank halves.
And then you have plenty of replacement options , pistons
Etc

Big Cat pistons, rods will also work. -(Artic Cat)

Southern flatlanders most likely have never been on a truly fast
200 hp 2 stroke sled!

Have you ever been to Hay Days?
Matt Fisher
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Location
Visalia, CA US
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1084th
6/30/2013 9:17am
Never heard of Hay Days.

Do the YZ con rods fit the RM400 crank? I had a 80' RM400 in high school and at some point want to pick up another one. I've read that finding pistons is difficult at best; wondering if your rod trick might be the solution.

The only sled I've been on was some rental POS in the early 80's. A 200hp model sounds like it would provide stupid levels of fun!
edgo897
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579
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1/3/2010
Location
Land O Lakes, FL US
6/30/2013 11:16am
Did you rebuild the stock shock? I had Sage Suspension do mine and it works great. I put Race Tech springs in the forks and fill them to six inches below the top with forks collapsed and springs out. I'm happy with it.

When I rebuilt mine last year I called my Suzuki dealer for another part and mentioned the lack of availability for a connecting rod. The parts guy looked it up in the computer and told me there was a rod in stock at a dealership in Idaho Falls. I called them up and it was in my mailbox two days later. Got the last one I guess. I used a Wossner Maico 490 piston in mine.

What was done to the top in to get to 540cc's?

Ed

The Shop

7/2/2013 10:09am Edited Date/Time 7/2/2013 10:19am
Yes, the stock suspension has been completey
Rebuit, new fork bushings, Race tech gold valves
The forks work really well, just setting up different
Preload spacer lengths, I machined up spacers starting
From .5 inches in length up to 2.25 using YZ465 new springs.
Can swap out in minutes per track

Rear rebuilt with stock set- up spring, arms
Have been remachined using Al-Ni-Brnz
It works better than my new Honda, Yamaha I
Have for comparison

I just would like to find someone who has a
Contact with an Ohlins supplier.


The 465 engines I have a completly rebuilt
Top to bottom, new Suzuki rods, all internal
Bearings, even a new clutch basket In the one!

Mac suzuki had 2 rod kits on the shelf, I had
The clutch basket in a few days.

I have enough parts to build 2 more bikes.

The Yamaha rod has the same pin sizes, but
Is 5mm plus in length, c to c or more if i remeber.
Also the 1000 cc twin rods from a cat work.
It gets pretty involved from here. Rebore out the
Crank halves to accept a larger pin etc,,,,,

A guy from australia bought all my spare swap
Over parts for the conversion, I guess that was
2 years ago now
7/2/2013 10:24am
RM400 rods? I am sure you could retro fit
Something similiar

But you have to do the legwork

Look at the Wieseco main data base for
Bore and stroke info

For all mfg 2 strokes, buy up a few used
Engines and dissasemble and see what
You find?
Lasse
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529
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11/5/2015
Location
DK
Fantasy
2940th
8/17/2016 4:24am
Any sources for lower bearings? I need to overhaul my crank and am looking for parts.

Can get an YZ490 rod kit easily, but how much of that kit can I use?
Micahdogg
Posts
1267
Joined
1/3/2011
Location
US
11/13/2020 12:43pm
Yes, the stock suspension has been completey Rebuit, new fork bushings, Race tech gold valves The forks work really well, just setting up different Preload spacer...
Yes, the stock suspension has been completey
Rebuit, new fork bushings, Race tech gold valves
The forks work really well, just setting up different
Preload spacer lengths, I machined up spacers starting
From .5 inches in length up to 2.25 using YZ465 new springs.
Can swap out in minutes per track

Rear rebuilt with stock set- up spring, arms
Have been remachined using Al-Ni-Brnz
It works better than my new Honda, Yamaha I
Have for comparison

I just would like to find someone who has a
Contact with an Ohlins supplier.


The 465 engines I have a completly rebuilt
Top to bottom, new Suzuki rods, all internal
Bearings, even a new clutch basket In the one!

Mac suzuki had 2 rod kits on the shelf, I had
The clutch basket in a few days.

I have enough parts to build 2 more bikes.

The Yamaha rod has the same pin sizes, but
Is 5mm plus in length, c to c or more if i remeber.
Also the 1000 cc twin rods from a cat work.
It gets pretty involved from here. Rebore out the
Crank halves to accept a larger pin etc,,,,,

A guy from australia bought all my spare swap
Over parts for the conversion, I guess that was
2 years ago now
Resurrecting an old thread....I had a question on the YZ 465-490 connecting rod. If the rod fits aside from being 5mm longer, could this be utilized along with a 5mm spacer under the jug?

Micah
MaxPower
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8/15/2006
Location
NJ US
11/13/2020 8:03pm
Those are cool bikes. Rob really made his nice.
TTperra
Posts
311
Joined
9/15/2015
Location
SE
11/14/2020 4:03pm
Yes, the stock suspension has been completey Rebuit, new fork bushings, Race tech gold valves The forks work really well, just setting up different Preload spacer...
Yes, the stock suspension has been completey
Rebuit, new fork bushings, Race tech gold valves
The forks work really well, just setting up different
Preload spacer lengths, I machined up spacers starting
From .5 inches in length up to 2.25 using YZ465 new springs.
Can swap out in minutes per track

Rear rebuilt with stock set- up spring, arms
Have been remachined using Al-Ni-Brnz
It works better than my new Honda, Yamaha I
Have for comparison

I just would like to find someone who has a
Contact with an Ohlins supplier.


The 465 engines I have a completly rebuilt
Top to bottom, new Suzuki rods, all internal
Bearings, even a new clutch basket In the one!

Mac suzuki had 2 rod kits on the shelf, I had
The clutch basket in a few days.

I have enough parts to build 2 more bikes.

The Yamaha rod has the same pin sizes, but
Is 5mm plus in length, c to c or more if i remeber.
Also the 1000 cc twin rods from a cat work.
It gets pretty involved from here. Rebore out the
Crank halves to accept a larger pin etc,,,,,

A guy from australia bought all my spare swap
Over parts for the conversion, I guess that was
2 years ago now
Micahdogg wrote:
Resurrecting an old thread....I had a question on the YZ 465-490 connecting rod. If the rod fits aside from being 5mm longer, could this be utilized...
Resurrecting an old thread....I had a question on the YZ 465-490 connecting rod. If the rod fits aside from being 5mm longer, could this be utilized along with a 5mm spacer under the jug?

Micah
In general, yes it works
But you might consider it will increase crankcase volume, maby its a benefit?
If you find a piston with 5mm lower compression hight(from pin to top of piston) you will keep volume the same as before
1

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