YZ-2 with B-Max rear end.

[J'MM'N]

Converted my YZ-2 to the B-Max2 gearbox using parts obtained from Fibrelyte. Although this set up is for low grip situations, people may find it useful over the Winter months and where tracks have variable grip levels around the circuit. Swapping from one gearbox to the other trackside, takes less than 10 mins.

Consists of:
Battery Brace 2.4mm
Rear shock tower 4mm
Shock tower spacer 3mm

Work involved:
Drilling two countersunk holes in chassis where waterfall fits. This was done using old B-Max2 chassis as a template.

Fitting a 2mm spacer between waterfall and chassis, this could also be done using washers. Some people may wish to go 3mm if your lipos are a little fatter.

Fitting a 2mm spacer between rear camber support and gearbox lug.

The B-Max2 forward/rear hinge pin support fits straight on. I opted to use the one from the YZ-2. Which will need a small amount of filing, to get the full motor travel on motor plate.

A small area needs to be removed from the plastic chassis sideframes, for battery placement.

The wing mounts need 2mm removed to correct the angle of wing. If using B-Max2 plastic shock tower, this process doesn't require doing.

On the bottom corners of the carbon shock tower, a small angle will need to be filed to clear gearbox casing. This is something Fibrelyte couldn't do themselves, but is an easy operation with just a few small strokes of a file.

You could opt for the plastic shock tower from the B-Max2, but the carbon tower gives an extra shock mounting hole. Holes 1, 2 & 3 are the same as the YZ-2 and holes 3 & 4 are the same as the two inner holes on the B-Max2.

[neallewis]

Very nice. did you design the tower, or did fibrelyte?

I was about to draw up a battery plate to fit, but looks easier to just order this one. How much was the kit?

[J'MM'N]

It was about £26 plus postage for all the parts.

I did it just before Yokomo came up with theirs at euro's, hence I wanted the parts more similar looking to YZ-2 parts. The tower also has the advantage of the extra shock holes, so you can go more inboard like the YZ-2.

[Allan1875]

I ran mine at the euros but I could really do with getting that battery bar as mine as just extended from the standard one.

We also ran 1mm under waterfall and 2mm under gearbox lug.

If I was to contact fbrelyte to get that bar made, what do I ask for specifically?

[andys]

So... is there much difference (geometry wise) between a Bmax and a modified YZ with a Bmax gearbox?

Seems a faff if not - just run the Bmax?

Great post and conversion by the way - looks quality

[J'MM'N]

Allan and anyone else interested.

I'm sure Fibrelyte will sell the parts separately, if you contact them and ask for Stephen he will be able to help. Just mention YZ-2 parts for Trevor and he'll know what they are.

[J'MM'N]

Originally Posted by Allan1875

We also ran 1mm under waterfall and 2mm under gearbox lug.

Had noticed the team were running 1mm under the waterfall, but with battery brace fitted above ally hinge. Was their any particular reason for this.

[Allan1875]

Originally Posted by J'MM'N

Had noticed the team were running 1mm under the waterfall, but with battery brace fitted above ally hinge. Was their any particular reason for this.

None that was mentioned. I just extended my YZ2 bar but i definitely prefer to run the bar you are running, much neater.