250-500cc Next Project - 6 speed WR 250

sounds like you need to send your suspension out

Ive got 93 sat on shelf looks like ive got an evenings work at some point, im flat out on a 1972 beetle project for my lady so ridings gone on back burner as summer in uk is only a few good days an im outside welding etc.
Will stick the 93 on in the next month or so.
The pipe angles different or i need gnarly too? As that seems to be the only option for replacement pipes here.

my 99 and my 93 use the same pipe so there should be no issues
the cylinder looks the same just seems to be a port timing change
and boy was that huge

Don't go swiping up all of those '93 cylinders! I want to change out my '92, so I can buy replacement pipe.

I miss the 360...Every time I ride the 250, I miss it more.

The way it's looking, I'm all moved now (not unpacked or set up, just stuff physically moved). So, I should be able to focus on shop setup this week. I've got a race this coming Sunday, but I'm going to see what I can do about getting set up and getting my tools back. Here's a tip, don't loan tools....ever. Especially to a 17 year old kid...who's girlfriend lives 2 blocks away from my old house...told him to just put them in his truck and leave them on the porch the next time he was going over there, but noooooo...that would take too much work.

Some people just dont get the bug with 360's me i love it i keep pace with 250 an hardly pushing revs but can only hear mates 250 screaming towards its limit, snick it in 6th an brwwoooor over take.
Pure joy every time, for those with a 2000 + husky 360 i strongly recommend lectron i do not need my decomp head its a one kick affair now.
Should of pulled the trigger sooner.

Tools dont get me started i live in shared house an seems like the others here own nothing of their own so my tools i find in the garden, shed, garage washing machine anywhere and everywhere other than the roll cab i store them in!
Frustrating to say the least, i feel your pain msmith

kids have no respect now. i thought it was the best thing ever when someone would teach me something or let me borrow the tool..now im the one usually lending...

Hi all,
I have a WR300 2010 and have found a 6 speed tranny from a 92 wr250. I like the idea of the extra gear as I find the actual five speed pretty slow in fifth gear.
What I don't like is to disassemble the bottom end right now as I have just put a new piston and don't want to open it up again... But maybe I will buy it now for later.

I was also thinking to get an entire WR360 motor and do a swap... But I have a lot of doubts with that. If I get your first messages right you commented that the 360 is somewhat boring, but now you are missing it... hehe. What are the main differences between the WR360 and the WR300 ? Do 50cc make a huge difference ? Is that engine (still) harder to start ?

WR360 motor in 2010 chassis or WR300 with 6 speed tranny ? What is better ? hehe


Thanks.

Yeah, I would not tear it down unless you already have a need to (i.e. replacing bearings).

It's boring in that it's a ton of power whenever you need it and is very tractable under half throttle and revs slower, not really boring boring. You can get away with a lot of stuff in the technical sections because it just won't stall, but it also takes a very light touch on the throttle. It will wear you down over time. That 50cc difference is bigger than the 250->300 gap, it's really a monster engine.

I'm going to eventually put a 360 back in a new frame. I truly dislike the 250. The 300 would be great with the extra gearing, but then again after the 250 failed with a 6 speed in it, I'm not all that confident in it. Realistically, when I get around to fixing the 300, I'll be putting it back to the stock 5 speed.

Then again, I haven't had time to work on bikes or ride since August, so it's all a distant memory.

Thanks for your answers.

What was the cause of the previous 6 speed disaster ? I think the gearbox should stand well the power of the modern bikes, the 360 has more torque and use that same gearbox ...

I still haven't gotten my tools back to split the cases, and haven't had time to do it even if I did have them back, so I can't say for certain.

If I recall though, the 2nd and 3rd gear are quite a bit narrower on the 6 speed, and I would say I probably use those two harder than any of the other gears. First is too slow, 2nd to 3rd is great for the majority of enduro tests in the 15-24 mph average and they're used in all the accelerate/brake/repeat sections, 4th/5th/6th I'm usually in a lot more open/smooth terrain and the acceleration is a lot more consistent as those gears are more often short shifted and that's my time to relax. I don't know the history of the particular transmission I used, but I'm assuming it must have had unseen damage. A tiny fracture or something, anything that could have caused one of the gears to fail, then in turn take out the other. That 250 feels like a 125 compared to the 360, so no doubt they were designed to handle a lot more power than it was being given -- but I'm thinking if I wanted taller gearing in the future, I'd look for one of the 5 speed wide ratio transmissions. It's just a matter of geometry. Wider gears mean more area for the splines to engage, and that can not be a bad thing for reliability. I'd wager that if they made a 4 speed that wasn't skimped down for supercross, that it would be a even more robust. I'd like to see some of the factory EnduroX bikes that have 3 speeds in them. I know they also go for lightness, but you'd have to think that they'd make them as strong as possible as well.

they did make a 4 speed in the early 80's, and yes, the gears are huge.

They also made 4 speeds around 2000 as well, I have a couple of sets of them.

I suppose and hope that this was the problem..

Regarding the dimensions of the transmission teeth, I found some photos here on the forum regarding the Cagiva 5/6 speed transmissions and If I'm not mistaken our motor is the Cagiva one and from the photos the gearbox seems to be the same.

http://www.cafehusky.com/threads/question-on-cagiva-250-6-speed-transmission.39281/#post-376800

I really don't appreciate a big difference in the gear size, the gears are closer to each other but not a lot narrower as it seems...

Well, I think I will buy the gearbox and left if in the shelf until I need to touch the bottom end, If I don't get to the point of mounting it I can still re-sell it IMHO

Regards and Happy New Year !

that was my thinking so i bought a spare 360 bottom
quite justified at the time as i had 4 360's

I installed the 6 speed in my 250 when there was no other rebuilding that needed to be done and feel my time was well spent. Those bottom ends usually last a long long time and you will most likely be missing years of the six speed if you wait.

Nah ive always had six gears i love my 360. Bwwwwarraaaa

Any news about this ?