Front Spring Set part No:
W5181

Rear Spring Set Part No:
W5183

This new JC body seems to accommodate the longer prototype chassis. Further proof that the new chassis is coming out as an update.

What ballcups for the B4.1 would provide tighter tolerances. Just seems to be too much slop with the stock units. I have seen pics of Kinwald running the Losi grey extra rigid ballcups. Would RPM be tighter?

RPM is tighter, stronger, and last longer. Stock ball cups dont last long in the cold winter indoor months because they get to brittle.
I never have run the losi ones.

I see Thielke has a Ghea sticker on his body. Wonder what he is running? Ghea has trick delrin tapered pistons in hole sizes 1-4. They cost a fortune at $19.11 per set of 4 based on current exchange rates.

If any of you have put the Kyosho big bores on your B4.1 would you please care to share or pm me with what it takes to get them mounted up properly? I really like the car, just not a big fan of the V2 shocks. There are 3 22's at our local club and I have driven them all, overall the car is too numb feeling to me compared to the 4.1 but I think it has a distinct advantage on the types of tracks we run on which are very bumpy with grass and dirt mix. My buddy pointed out to me yestery that at one spot on the track there was dead grass, live grass, and a spot of dirt that was blue grooved!

should be not over 160 degrees , under that temp & your good to go .

I use the grey losi , Seen the RPM's being use by some of the Team drivers as well...


Most use the losi for strength more than their fit or weight

The longer body is for longer b4's running a t4 chassis...

Is running a B4 with a T4 chassis race legal?

I like that idea?

The part numbers are listed about 10 posts up! If all of you are dead set on running the Kyosho springs, just bite the bullet and buy the Kyosho shocks

The reason to use the k-spring is for their more progressive spring rate compared to the Ae green spring ...

Note:

Do not use the big bore springs , standard is the size that perform best , use Ae v2 shock ..

hmmm.... does anyone else think the chassis on brents car is lengthened around the rear u brace/t piece area of the chassis?or is it just me.

The chassis' are just a T4 chassis with around 4mm cut out of the middle. I just finished mine this weekend and ran it in the main. For the first time ever running it with no practice laps, I liked it alot! Just need to make a few small setup changes to accommodate .

???? I know the part numbers, just want to know if anyone has mounted the Kyosho big bores up?