50cc biikes CRUSA

imslow · Dec 16, 2004

Any of you guys have opinions on this deal? The price is pretty good . . . I gotta know soon its the Reiju 50cc Cosmo etc. oooops/

scott evil

jbranson · Dec 16, 2004

I guess basically that's it....it's a good deal.

You will however be amazed how slow they are in stock form. With the 80cc kits they are pretty quick though...kit can't be very expensive I don't think.
JohnnyB

paced_haste · Dec 17, 2004

"pretty quick" is 'pretty fuckin relative' at those speeds. i passed an 80cc one on a CB350 honda like it was hooked onto something. just thought i'd weigh in so you guys don't think i forgot about you.

Z

jbranson · Dec 17, 2004

Pretty quick would be about 1:50 flat at NHIS. A good rider can sometimes beat Mary on her 50. Ruffo has beat her a couple times on his Derbi with the kit in it.
JohnnyB

joe c · Dec 17, 2004

out of the box the last cycle weird says 52mph for the berbie. and it does that in the 1/4mile, then theres nothing left. i dont know what the top speed is at nhis. its also something like 275 lbs dry. so it aint light either.

hi zach

jc

joe c · Dec 17, 2004

out of the box the last cycle weird says 52mph for the berbie. and it does that in the 1/4mile, then theres nothing left. i dont know what the top speed is at nhis. its also something like 275 lbs dry. so it aint light either.

hi zach

jc

jbranson · Dec 17, 2004

They do about 70mph with the kit in them.

And yeah, 275 ain't light.

JohnnyB

UngaWunga · Dec 17, 2004

quote:
They do about 70mph with the kit in them.

And yeah, 275 ain't light.

The price is right, but man... my RD350 is lighter than that... with 3-4 times the HP...

But I'd be buying it for the wife... honest... really...

UngaWunga · Dec 17, 2004

quote:
They do about 70mph with the kit in them.

How much do the kits cost? I haven't seen anything list for those.
They'd almost be required if I was to get one.

jbranson · Dec 17, 2004

http://www.123bikes.co.uk/acatalog/...g/XS_PARTS_BIG_BORE_KITS_405.html&CatalogBody

http://malossiuk.com/motorcycles/

http://www.bike-spares.co.uk/acatalog/RIEJU_PARTS_CLICK_HERE.html

JohnnyB

Hey....the first link sucks anyway.

Edited by - jbranson on Dec 17 2004 11:42:01 AM

UngaWunga · Dec 17, 2004

Yeah, they suck. No pictures of what you're spending $300 on...
And then you'll have to buy a new carb and pipe to go with the big bore kit, so that'll be another $3-400... Hmm...

n/a · Dec 17, 2004

How about Aaron responding to this. He rode a derbi like the rieju in stock form.

Champ

aaron · Dec 17, 2004

You can take off 18 lbs. by removing some bracketry that holds things together and remove much more weight if you own the bike by removing subframes and the gas tank and replaceing it with something smaller. The big thing I found was that as a 50 it was geared so the it was hitting redline at the end of the straight which I found non-useful everywhere else. I got a sprocket one tooth smaller in the front and found it perfect everywhere but the end of the straight. I could run with Ruffo first until the end of the straight but he is a better rider and his motor did have more over all pull. If I bought one I would by the big bore, remove everything, and then go 2 teeth quicker in the rear.

Aaron

texmawby · Dec 19, 2004

joe c. your really wrong on the weight estimates. in preparing my 1998 derbi gpr i removed lots of stuff, put it in a box, and weighed everything. i figured i removed 23lbs (like aaron said, new peanut tank installed under the luggage bonnet running straight premix, got rid of the subframe, passenger pillion, starter, battery, and any unneccessary bulls***). then when samara talkin and i were up at nhis i took her reiju (which had the big bore) but had the majority of street stuff still on it, over to the scales garage, it weighed in at 199lbs. my derbi, minus the 23lbs weighed 203lbs. so i figure box stock the derbi weighs 226lbs. but the deal isn't for derbis it's for reijus, so some insight on the reijus (and if any of you want to pick my brain on derbis, just ask).

the reiju is equipped with the yamaha/minnerelli am-6 motor. this is the same motor in aprilia rs-50's. it like most stock 50cc bikes blows hard without the bigbore kit. however there are lots of cool/trick aftermarket stuff that you can get for it, unfortunately, cosmo doesn't have any more kits in stock, but these can be had in the states without going to the u.k. or spain for product. lance weil and i built a full-tilt boogie reiju with all the go-fast goodies. full round crank, ported/polished 80cc kit (not the 73cc), digital pvl ignition, krd pipe (krd stands for kunda racing division, kunda is a subsidiary of reiju, and the krd stuff is their top-of-line), and 24mm delorto carb (round slide, forget model). were trying to make new downdraft intake so we cold fit a 26mm flatslide (there is a piece of cross frame bracing that interfeers, but we never finished. this bike was tested at pocono and was clocked just over 100m.p.h.

now before anyone says b.s.! i will admit that radar guns are subject to false readings, however, mike himmelsbach, who was test riding was lapping consistantly expert riders on r6, gsxr's, cbr's, etc.....
he was duly impressed with our creation.

the basic kit, 73cc big bore (complete), 21mm delorto, racing pipe and stinger will run $700-$850.00 u.s.d.

the biggest challenge i think you'll have is finding tires to fit the wm1 front rim. the rear can run an avon 90/90 front tyre (backwards of course). now the stock tires aren't junk. they are pirelli mt75's i think, i have also seen them metzler shod but don't know the specific tire. we, at team pro-motion, ran a reiju rs-1 10 round series with a fleet of 13 that we leased from cosmo, and never had tire issues. if one was interested they could contact team calamari in california for tire options (they build derbis and ysr's and i believe can source slicks etc in 16").

if you know how to ride a two-stroke (i'm still learning), and don't engine brake into corners (guilty, half a dozen times) the cranks are solid, and these little beauties can be a great inexpensive foray into racing, a cheap second bike/class to run, and a cool pit bike to run about with at the track.

i have kept up for a few laps with mary before (but she is way to smooth, and i'm not) on my modified derbi gpr 73cc.

jesus, don't i feel like the big brain. guess i've been reading to much johnny b lately in technical.

hope this helps any/all. this really started as a way for me to tell joe c that he was wrong.

wrong! wrong! wrong! wrong! wrong! wrong! wrong! wrong! wrong! wrong!

positively, bored of vacation that is,

texastini

zach, what the hell do you mean that "it was hooked on something?"

joe c · Dec 19, 2004

igot that from cycle whirled. it was a gues, i just remember it weighed alot. and the top speed i quoted was what they said. and, it also listed them for 4k estimated price. way high im pretty sure. so lick my butt. (this is general right??)

tex, i just took delivery of my new type one top end. its perfect. 65 bucks on ebay delivered. unfortunatey, i wont be ablke to have the new bike out in the spring. too much to do. so im ging ot freshen my motor top end, and run the old bike for a while longer. til i get the other one done. ug. 2 months left til vir....man. this wera season is way too short! bring on ccs. i hope they get that done so we can have more track time.

me

texmawby · Dec 19, 2004

texmawby · Dec 19, 2004

joe,

yeah that's about where i am in preperation/development. did you find that spare $1000.00 yet? congrats on the deal!

tex

paced_haste · Dec 21, 2004

tex - i passed it "like it was hooked onto something". as in hooked onto something stationary. it was going slow, and CB350s are slow. that was my point. nothing special

Z

jbranson · Dec 21, 2004

Zack.... I don't get it... explain further please.

Damn I crack myself up.

JohnnyB

50cc biikes CRUSA

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