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Messages - brent j

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Suzuki / Re: RL250 flywheel side main bearing failures
« on: November 24, 2021, 07:12:24 PM »
And a bit more on RL flywheels and bearings.

My RL has been in regular use for nearly nine months and now I've added a flywheel weight of about 2 pounds.
If anything will test the bearing it will be this

Suzuki / Re: TM185 Sidepipe
« on: November 24, 2021, 07:08:19 PM »
TS frame is way lighter so if using that the Top rear engine mount could be sorted with a bit of ingenuity Brent as the TM engine is thinner and usually a tab gets welded to suit . "Perhaps" a length of pipe could be used as a long spacer with the TS long mounting bolt.

Not sure how a 185 would go in a TM frame.

I would score a TS185A  as it has better porting to start with and the better clutch and use two separate ported barrels and ignitions.

My post was a bit light on detail, I actually have a bit more than 80% of a TM125, that's my starting point. I've got the TM125 motor plus I've got a 185 motor lined up so it's going to be a bit of a mix and match special.
I built one in the 70's and I seem to remember the top rear mounts match, the bottom right, rear mount is 30mm wider on the 185 and three out of four front mounting bolts line up. I'll make a second set of mounting plates to suit and a 30mm spacer for the lower rear.

Suzuki / Re: TM185 Sidepipe
« on: November 22, 2021, 10:50:52 PM »
So funny to read this thread. I built a TM185 as an enduro bike in the mid 70's and I'm collecting the parts to build another one

With a bit of fiddling this one will be an "interchangeable" bike. TM125 motor with down pipe for fun VMX or a 185 motor with pipe for Vinduros.
I reckon the motors could be swapped in about an hour or so.

General Discussion / Re: Casting polyurethane components
« on: October 26, 2021, 12:09:06 AM »
There was a guy on here quite a few years ago who made a range of polyurethane parts.
He ended up having everything wiped out in a fire.

I don't like to post peoples names online without their permission so I'll send a PM

Tech Talk / Re: powder coated hubs
« on: October 06, 2021, 07:36:35 PM »
I powder coated a pair of hubs years ago.
I masked the sprocket and disc mounting surfaces but found the powder coating cracked and flaked away where the spokes pulled against the mounting holes in the hub.

Wanted / Re: Suzuki TS185 motor
« on: May 18, 2021, 02:20:15 PM »
the 76 ts185a was the last of  piston port side port motor before the er 185 centre port motor's came out.ive got a spare A motor that needs a rebuild with cdi if that's any good to for more details

Thank you Matt, PM sent

Wanted / Re: Suzuki TS185 motor
« on: May 17, 2021, 12:12:18 AM »
I've seen that add thanks God, waiting to see what it will cost to get them here

Wanted / Suzuki TS185 motor
« on: May 16, 2021, 08:39:51 PM »
I'm after a TS185 motor, I want the side port motor up to 76.
I'm not sure when the side port motor finished



Suzuki / Re: RL250 flywheel side main bearing failures
« on: April 22, 2021, 08:53:11 PM »
To add a little to this thread.
I rebuilt my RL motor with a new Suzuki LHS main bearing with the oil slinger.
The RL cases are drilled and machined for both the oil pump and oil feed to the LHS main bearing. This is done from the factory.
The oil pump has no cable so stays in the idle position and pumps a minimal feed to the bearing. The original oil feed to the inlet is teed back into the feed line from the tank to the pump to prevent the un-used pump feed from building up pressure.
I'm using a Suzuki racing lit oil tank (which lasts about three tanks of fuel) and I run premix at about 50:1. I run MOTUL800 (in all my 2 strokes) and find it burns cleanly while leaving a film on everything.
i was lucky enough to score a TS250A motor from Firko, thanks again, which offered up the oil pump, lines and fittings and also the TM style clutch cover and release mechanism.

Honda / Re: Honda MT 125 KO 1974
« on: December 15, 2020, 09:48:02 PM »
My recollections of the MT125 from a long time ago.

Somewhat under powered, good brakes and it handled very well.

Looking at it from now at an older age and less concerned with racing one I think it would make a good vintage trailbike.

Good handling, good brakes and reasonably light. The lack of power probably wouldn't be a problem as you could just hold it open and it's not going to try and kill you or wear you out

For Sale / Re: Suzuki RL250 parts for sale
« on: November 25, 2020, 07:26:14 PM »
You have two!

Suzuki / Re: Suzuki still selling new TS185's!!!!!
« on: July 11, 2020, 07:12:31 PM »
Each country should have a TS185 race class, you can only remove bits & rejet. Bring racing back to low cost.

Careful John, you'll start another "Do you Moto100" thread.

Tech Talk / Re: Suzuki RL250 lower fork offset
« on: March 06, 2020, 04:06:27 PM »
I figured seeing your doing so much to the frame you would be able to run a straight edge down the headstock and a find that magic mark in space of where to measure from.

From a little investigation it seams the tolerances or subsequent "usage modifications" on the frame change that head angle a bit.  Ive read one owner recording three different measurements from different machines. with variance of 3/4 " from axle to Fr engine mount. Good luck with the build.

The way Suzuki put these frames together there's no accurate way of measuring the frame, there's a weld seam just where you'd normally measure. I think I read about the three different frame/steering head angles on the trials forum. A guy had and modified the head angle of three frames. I've kept the same steering head angle but shortened the frame to move the weight forward then lengthened the swingarm to get the wheelbase back. I am copying what someone else has done and apparently it is very successful. I'm looking forward to finding out!

Tech Talk / Re: Suzuki RL250 lower fork offset
« on: March 03, 2020, 10:55:49 PM »
I'm on the bludge again.
To try and work out if the forks on my RL are useable I need to try and find the offset from the centreline of the forks to the centre line of the axle. Just a couple of mm makes a very big difference in how the bike handles and turns. I figure I have a few options
1 If someone can measure the offset very accurately, and it's not easy
2 Someone can loan me a lower fork leg so I can measure it. Happy to pay post both ways (obviously) and even a cash deposit
3 I bite the bullet and buy a set of forks

I have a Beamish RL250, early silver engine type- so should have same forks
happy to try and measure offset , but haven't long assembled the forks , so would rather not dismantle again to measure
how would you recomend measuring offset of assembled fork ?

Thanks djr but getting a measurement usually means pulling at least one fork leg off.

My method is to put the forks on the bed of a milling machine (or accurate flat surface) and bolt them down on parallel spacers. This way I can get an accurate measurement from the fork leg to the table and axle centre to the table. I can also put the triple clamps on and measure from the steering tube to the table and/or fork leg. Plus there's a bit of adding and/subtracting tube/forkleg/axle diameters.

Tech Talk / Re: Suzuki RL250 lower fork offset
« on: March 03, 2020, 10:47:22 PM »


Steering Angle                                    60º                           60º (right and left)                                60º (right and left)                             60º (right and left)

Turning Radius                            64 in (1,630mm)                     53 ft (1.63 m)                                      5.3 ft (1.63 m)                                  5.3 ft (1.63 m)

Trail                                                   x                                 3.0 in (76mm)                                      3.0 in (76mm)                                   3.0 in (76mm)

Caster                                                x                                          63º                                                    63º                                                   63º

Thanks for that Pokey, I can put the rake, trail and measured wheel diameter in the trail calculation program I have and that will give me the total offset.
Suzuki (and it seems most trials bikes) have the steering tube at a different angle to the fork legs so it's not really possible to measure the offset at the triple clamps.
BUT, Having the full offset figure (from the numbers you have supplied) means I think I can bolt the entire fork assembly onto the table on the mill at work and get an accurate offset measurement for what I have.

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