Yokomo Bmax2 M

[mes]

It is a really nice dirt track:
RCRT Duisburg e.V.

[mekios]

Very nice! It's the kind of dirt tracks we have in Greece.

[mes]

Great track! We used to have a dirt track in Troisdorf, too, but as only a few committed members in our smallish club are willing to maintain the track and weather in Germany unfortunately is not like in Greece, we had to move on to astroturf.

[s22jgs]

yeh 400cst

it really depends on what surface and air temp to whether you want to run that hard though.

in running the kit pistons, so 1.2 rear, and in running 200cst tomorrow with a 1.9 spring.

but that's because its going to be 5degrees and the track is really bumpy.

looking at alot of Japanese tracks they tend to be smooth so would explain the use of 400.

[mekios]

What is a 1.9 spring?
By the way, i have seen this comparison chart:
http://www.petitrc.com/setup/yokomo/...ringsChart.pdf

Does this mean that i blue rear springs on the b-max 2 are the same as orange rear springs in b-max 4?

[Reo]

Hi, i think it is to much play in rear arms.. the toe is changing pretty much when i rocking arms. Is it to bigholes for the pins? feels like it..

[s22jgs]

Originally Posted by mekios

What is a 1.9 spring?
By the way, i have seen this comparison chart:
http://www.petitrc.com/setup/yokomo/...ringsChart.pdf

Does this mean that i blue rear springs on the b-max 2 are the same as orange rear springs in b-max 4?

I use the AE springs. 1.9 is the spring rate.

That chart is misleading. All it does is match the names (super soft) to colours. It doesn't have any relation to spring rates from what I could find. For example the bmax4 super soft is harder than the bmax2 super soft

[s22jgs]

Originally Posted by Reo

Hi, i think it is to much play in rear arms.. the toe is changing pretty much when i rocking arms. Is it to bigholes for the pins? feels like it..

Have you fitted the front and rear inserts?

[Reo]

yes, i just now fitted bmax4 rear arms, and they are nice and tight, and free movement. just have to shave off 1mm on both sides of arm.

[Reo]

to much play i hub to.. option available in alu but to expencive. Try bmax4 hub to and see..

[Reo]

nice, bmax4 parts are much tighter! arms+hubs..

[mekios]

As i understand it, it is a philosophy of yokomo to have tight fronts without play and allow some play on the rear.
Even the B-Max 4 has some play on the rear lower arms.

[Reo]

well never heard that.. bmax4 arms and hubs are much tighter ennyway.

If it helps handling with much play that changes toe angle on and off power cant realy see that.

[xfactor]

Hi i also had play in rear arms (front to back) movement, but fitted a shim this gives extra tuning as you can alter the shim to change wheelbase via the arms this is the same as tamiya and kyosho buggies

[Reo]

this was not front\back movment.. sideways..

[discothesnake]

I have these issues also. Not sure how much it troubles handling tho.

[MattK]

mine had small play in the arm but mainly forwards and backwards, but I cant really see it will make any difference to how the car handles on offroad tracks. (or with my driving)
Probably more important the arms are free im my opinion.

[s22jgs]

Originally Posted by MattK

mine had small play in the arm but mainly forwards and backwards, but I cant really see it will make any difference to how the car handles on offroad tracks. (or with my driving)
Probably more important the arms are free im my opinion.

there is forward backward movement which is due to antisquat. If u run 0 degrees u will have little to no play. By running antisquat you effectively lengthen the hinge pin. If you are worried about it just shim it out.

its not a design or manufacturing fault, its just maths and angles.

i beleive the Durango manual said to shim when runni g more anti squat. I don't think its an issue if u do or not though. When moving forward the arms will always be pushed back and wont move forward unless you go in reverse

[s22jgs]

Originally Posted by MattK

mine had small play in the arm but mainly forwards and backwards, but I cant really see it will make any difference to how the car handles on offroad tracks. (or with my driving)
Probably more important the arms are free im my opinion.

its caused by anti squat angles effectively lengthening the hinge pin. Its not a design or manufacturing fault, just maths and angles. If you don't like it just shim it out, but to be honest once the car is rolling they will settle backwards and wont move forwards unless u hit reverse

[GML]

Originally Posted by mes

It is a really nice dirt track:
RCRT Duisburg e.V.

Do you mean that B-max2 Mid is good on dirt tracks ?