looking for info on how these two bikes compare to each other on the race track, either 50cc or the 72cc or the 80cc. i am tired of the bigger race bikes, just want to go out and have some fun, looking for the pros and cons of these bike and how the stack up against each other on the track,any suggestions would help.
Hands down, the Metrakit is "known" to be a better track bike, chassis and/or motor........7 to 8hp (modified YSR) vs 9hp (basic Derbi/Metrakit), 72cc (13hp) 72cc + Pro Crank (22hp).
First, you must consider your build and body wieght and/or how well you fit on a bike.
If you're a little guy, like myself (5' 2"), then I suggest the MiniGP Metrakit (12" wheel). If you're any taller than 5' 5", then I recommend the BIG wheel (16") Metrakit.
If getting into racing, you must consider which Metrakit fits within the rules/regulations. If just for practice/fun, get which ever MK bike fits you and your budget.
BTW, don't forget about the NSR or GPR Derbi. FYI, the Metrakit uses a Derbi motor. They just beef it up a bit (race only).
Metrakit vs GPR Derbi.....The metrakit is way lighter and is race ready. The + side to the GPR Derbi is that it is street legal.
NSR vs Metrakit???Dunno, haven't witnessed these bikes together. However, an "outta the box" 04 NSR is very competative bike against a blinged out GPR Derbi (motor mods, MK pipe w/suspension upgrades).
Btw, just because it's a YSR, it is still very fun on the track, it just lacks the technology of the newer bikes. The YSR is best for those with a tight budget and/or are new to the track and/or racing (beginner bike).
OH! in regards to a "true" air/cooled YSR80, it will be classed against other 80cc bikes ....YZ80/85cc and/or CR80/85cc water-cooled bikes. I advise you not to invest in the YSR80 if you plan on racing it, it can't compete against the other 80cc bikes.
How does the Metrakit GP50 compare to the YSR in size? I heard it's bigger, but was curious. I'm 6'2 and used to "ride" a YSR. Tight fit, but still fun. I was hoping to purchase a Metrakit GP50 (w/mods) to race ... for fun. Obviously a struggle against smaller riders. But given what I've heard about the potential power of the GP50 (w/mods), I believe it can be done. I hope.
You may want to look into a gpr with your height. The 12" Metrakit bike won't fit your stature. The 17" version you will fit on but is a bit harder to come by. The nsr is a nice bike for sure. I have seen a 6'+ man ride one for hours and only couldn't feel his foot after. A GPR is a very competitive bike as long as you get any newer than 2003. They all have the 17" wheels so getting racing tires is easy. Also getting a good shock for the rear end is possible as I have them available.
So to sum this up let me know if your looking for a bike. I have New 2005 GPR's available along with older versions with the 17" wheels. I also have the metrakit bikes in both sizes. I also have all the tuning parts to make your bike scream!
It sounds as if you are a vendor. If so, do you have a website or anything what what you offer? There's at least 2 of us, possibly 4, who are interested in mainly the Metrakits. But we're still looking into other options.
If you could provide any information, that would be great. We would definitey be interested in the 'go-fast' parts.
The MiniGP MK bike is approx the same size as the YSR as is the NSR, if you didn't know already. Dan is right, the MK & NSR may be a little cramped, the rear-sets are higher than the YSR. Keep in mind, the MiniGP MK is very fast "outta the box" because of motor and light weight. Most clubs allow the Metrakit "as is", meaning, no mods allowed.
Again, I highly suggest for you to check out your local track/club and study the the rulebook and decide which Metrakit version fits within their rulebook. I'd hate for you to be turned down and end up racing against faster bikes if the metrakit ends up being "out-classed" to the class "you" intended to race in. If need be, call up the promoter and have them be specific in regards to which class(es) you'll be elligable in.
In regards to a GPR Derbi, and not to sway you from purchasing one, but since you plan to race it, keep in mind it is a street bike. Therefore you'll spend the extra skrilla on suspension, carb (24mm), pipe (MK) and/or porting, plus rubber (slicks) to make it a true competator on the track vs the BIG wheel Metrakit which is race ready (w/slicks)......sorry Dan [cry laughing]
I suggest you to do your math and compare pricing between the GPR w/ mods vs the Big Wheel Metrakit ("basic" MK 50cc is $4500).
fwiw, I got to see one (Big wheel MK) up close just the other day. The guy had a "basic" 50cc. It looked/seemed restricted with a smaller carb 19 or 20mm carb (not sure). However, it makes up for it with it's light weight. So, it "should" be an equal to a modified GPR derbi. I say "should" because I haven't seen the two together on the track, yet
The bonus to having a GPR Derbi, is that it's street legal
Exactly what he said. I am the metrakit rep for the midwest so getting all the bikes and the parts to ya is no problem. When it all comes down to it the gpr is a good bike but will need alot of work to make it competitive. The metrakit bikes even in the 50cc version have everything a race bike should have. The only things you would need to do is possibly upgrade the motor depending on your tracks rules. If it happens to be like the tracks i run then the big wheel 72 or 80cc set up hauls the big butt and the handling is exactly like a race bike should be AWSOME!
pierce, what are all the upgrades [kit parts] to the metrakit 50, what kind of horsepower gains are we looking at with the kitted parts, what all is involed to perform the changes and total cost bike included, and how soon could the bike be ready for pick up if decided to do the upgrades, and are you an importer of metrakit, and are part readily avaliable.
I am just a rep for metrakit so I work through the importer to get anything that you need. I supply to midwest shops and also run support for racers looking for good deals on parts and bikes.
Which 50 are you refearing to? The 17inch wheel or the 12inch? I think we may have some used 12inch version still around unless they got picked up for this season. There is also the Fun Bike which is the 12 inch version for adults.
The upgrades are endless for these motors and all depend on your pocket book. Custom Gear Boxes, digital ignitions, 72cc top end kits, cranks, bearings, carbs, gearing, exhausts, etc....
Thanks for the replies guys. This information is very helpful.
I have received responses from others elsewhere stating that I should scrap the MK and get an NSR for a few reasons, such as:
- The MK's take too long to sort out made competitive. As with any two-strokes, I understand the maintenance involved. But are these more tempermental than something like the NSR's?
- Getting parts for the MK are difficult as compared to the NSR which parts can be had at the local Honda shop. Although I don't have much faith in local shops ever having what I need, are MK parts tough to get? One such opinion listed the difficulty is the MK rider having only one source for parts, Ozzie. Pierce, I believe you mentioned that you need to secure your parts from him. Are there ever delays in getting parts?
Again, thanks for the input guys. Sorry for all the 'stupid' questions. Just trying to gather as much details as possible before a few of us make a purchase (especially without seeing something in person).
I can't comment on the part's stuff for the MK bike. However, it took approx a month for me to finally get an "SP" metrakit pipe for my Yerbi (YSR/Derbi) as it had been on back-order.
I've "heard" that the MiniGP bikes dont' take crashes too well. maybe hearsay?????Not sure about the Big wheel.
I do know that YSR's can/do take crash abuse and NSR's as well.
The bonus to the Derbi motor itself, there is a lot of potential for the 50cc motor (up to 22hp) vs the NSR offers a 63cc kit (hp?). Both the Derbi & NSR motors are solid!
There are variations of after-market pipes for the NSR.
Again, check out your club rules in regards to what mod's are allowed for the NSR.
I can account that the 04 NSR is very competitive "outta the box" and is why the club won't allow a pipe in the particular class I/we run in.
Btw, it is quite possible to convert the 04 NSR to street and registered. It has been done (not mine, yet )
The Pre-NSR's are basically the same as the 04 NSR other than electrical, plumbing, wheels & paint scheme's. However, keep in mind that the 04 is built "Race Only", the Pre's are a street bike and most of them now-a-days are converted race bikes and most likely have all the after-market hop-ups (Posh CDI, after-market shock (fully adjustable) & pipe)......at least the ones I've found
no question is stupid, how do you think I've gained my knowledge LOL
Well since the series runs here in the US parts are available for the race bikes. Sometimes there are shipping issues with getting orders from Spain but usually the parts are available. I keep parts on hand and yes Ozzie does supply me with others. As for which is easier to get I would have to say for hop up parts and most spares I can get very easy where my buddy with his nsr is still waiting on little things to come from honda. One thing to remember is that most of the big shops hated the NSR because they didn't sell. So they never stocked anything for them because they still have the bikes sitting on the show room floor. Especially in our neck of the country. So since we only deal in the small wheel bikes they are our main priority.
Don't get me wrong I would love to get you Bikes but I also love the NSR. I rode one last year for the endurence race at YSRCali's track and it was a blast. Handles real nice and has good power. I also have a friend that had to have his nsr motor shipped to texas so some specialist could rebuild it with a big bore, special made pipe and special porting for the tune of almost a 1000 dollars just so he could keep up with my derbi/ same motor as the metrakit bike. The nsr motor just doesn't tune easy and hop up parts aren't very available. Here is one of not too many places that have NSR aftermarket parts. So depending on what you are looking to do with the bike take that in to mind.
can anybody tell me why i can't find anything newer than a 2004 nsr 50 specs and pics, are the 05 and 06 bikes the same with no changes or other modifications than the previous years?
The 06 NSR is a 4T. Honda skimped on the engine but there's plenty of upgrades for XR series motors. Check out RCVmini.com, these are the guys Honda got the idea from. They've been doing the 4T conversion and others for a few years now.
lets add another bike to the mix! whats the story with the NSF100. how competative will these bikes be out of the box? are the any hi performance parts available for these beasts yet? shocks, engine kits, exhaust, etc.
I understand that the 4t is equal to the 2t. Difference is, power/torque is at the twist of the throttle of the 4t vs the 2-stroke, which gets it's power/torque while in the powerband at the pipe. Therefore is why on a 2-stroke must stay in the "power-band" to reach max performance.
It would be really interesting to see a 2t head to head against a 4t NSR with equal riders. Which would really be the better bike?
imo, I believe the 2t would actually be the faster bike.
Yeah I heard they are coming in with them but at 5500 a pop that is just nutz for a bike that will be under powered. And that is just the forcasted price so no telling what the dealers will try and charge when they actually get them. I like four strokes but in the mini racing sceen they are few except in the motards. Not sure how much more we can tell you about these bikes. Pretty much the easiest and best way of doing it is to just get one and build it up the way you want. Thats what we have all done and it works for us.
YSR vs. METRAKIT 
I am the metrakit rep for the midwest so getting all the bikes and the parts to ya is no problem. When it all comes down to it the gpr is a good bike but will need alot of work to make it competitive. The metrakit bikes even in the 50cc version have everything a race bike should have. The only things you would need to do is possibly upgrade the motor depending on your tracks rules. If it happens to be like the tracks i run then the big wheel 72 or 80cc set up hauls the big butt and the handling is exactly like a race bike should be AWSOME!
Re: YSR vs. METRAKIT 
