DRZ125/XF200 cams interchangeable??

So it seems the XF200 and the DRZ125 have identical geometry/design....I am trying to see if they are exactly the same dimensions...after studying the camshafts I see that the XF has a gear of some sort on the left hand side...the DRZ125 doesnt share this same feature...but both engines have provisions for this in the cam/valve cover....strange....I cant see that the gear has any function at all in the XF200...so I assume it is for some missing piece of equipment lost in design?....lol...the cams look identical otherwise...now I just need to get my hands on one to test it out!!....I'm wondering what the factory cam in the XF200 measures up to....and if it is wimpy as I suspect, the hot cams for the DRZ125 might give a bit of breath to the XF's 200cc setup!

Cam came in today!....went ahead and threw it in and am now giving it a little time to break in....initial impression is good!...it seems to be pulling further and with a bit more enthusiasm through the mid range!....nothing spectacular...but an improvement none the less!....after a bit of break-in I will strap the bike on the dyno and see if she picked up any extra power...

Impressive! I like the can-do, DIY attitude!

Pix??

cheers

which cam did you use buddy? any links, ive been thinking of doing this but in my 125, bbr motorsport sell cams for the drz which i was thinking of using

I went with the Hotcams piece...seems a little mild as far as cams go...but it works well!!...I also removed the inner valve springs.....frees up a little more power with the higher lift.

The Gear QM200 has at the end of its Cam is just a take off for the rpm indicator.

ANY Suzuki CAM(and much more) from dr100/LT125/GN125/DR125/LT160/LT185/DR200/LT230/LT250s familyWILL FIT. as they are ,basically, the same engine with different BorexStroke.

I have Both bikes : DR125se and a Qingqi QM200. So I´m entitled to say that Both bikes can interchange their CAMS,
-My Qingqi 200 uses a Suzuki LT250s Quad Cam : $92(alphasports.com) , That makes a world of a difference to stock; has visibly more Lift(torque) and duration(topEnd) than DRZ125Hotcams too( that I tried too.. .very similar to stock,so got rid of it.. . disappointed); so, dont waste your money.. .
-My sons DR125se uses the CAM I took out from QM200 :more torque from Idle to Topend, I´ve tried too a LT230s Cam($20Ebay) that i even enjoy more : more bottom end and mids: more suitable for the 125 with its small carburator.

The "best for the Buck" options I´ve found ,-from Tame to wild-, are these : DR125stock/LT185/DR200/LT230s/LT250s(only this "s" model will fit!!)
-Its isnt just a feeling, My DR125 with its LT230 cam hits 110km/h often, while hardly ever could with Hotcams.

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Originally Posted by Boostcrzy

I went with the Hotcams piece...seems a little mild as far as cams go...but it works well!!...I also removed the inner valve springs.....frees up a little more power with the higher lift.

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-Youll end Up trashing your engine. Engineers install 2 different springs for a number of reasons :

1/AVOID SEAT/Guide WEAR : both valve springs are allways paired clockwise/counterclockwise, this prevents valve turning on its seat!!
2/AVOID SEAT Rebound : specially with high lift cams!!. this happens at high rpm, Every Spring has a "natural" resonance frecuency at wich speed wont follow the Cam profile, in other words, valve is out of control and can hit the piston . the other spring NEVER rebounds at that given frequency.
3/Power LOSS/gain : theres a power Loss since valves are not closing when they are supposed to. theres too a LITTLE gain ,at low rpm, as its easier to move a soft spring-instead of 2 , that requires more stregth!!.

i heard that my friend is using a camshaft from djebel 200....is it the same with dr 200 and why djebel has more power compare to dr ...and totaly is it possible to do ?

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Originally Posted by Nima Naderi

i heard that my friend is using a camshaft from djebel 200....is it the same with dr 200 and why djebel has more power compare to dr ...and totaly is it possible to do ?

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==Beware : Djebel 250 is a Totally different engine to Djebel200!!.==
Yes, older Djebel200 models had the same Cam;(and Power=18hp) ,that DR200, However, newer Djebel models declare 20hp(2002); I cant say for sure , first hand, as I havent seen it in person,Is it True?; if Yes, ¿where gets 2hp more?!; my guess is that some of these new features is to be blamed:
1/New Oil cooler may help.(to stabilize-Not increase- power)
2/New bigger(in diameter) exhaust+header.
3/Carburetor : here is the MAIN difference : while our qingqi 200(or whatever make you had) has "only 28mm/16hp". Suzuki has allways mounted 31mm/33mm!. You can even fit a Keihin FCR35mm. That will ,probably,make a world of a difference at high RPM, but costs a fortune($700). This alone doesnt make much sense ; unless you remove first the standard CDI, for another "Unlimited"(see forchetto posts); to get its full potential.

There are cheaper ways to "release" the easy/Cheap HP out of your XP200.
-remove EGR valve (from 2007 on)
-Open -Dont remove-, 2x 25mm holes on top of your airbox.
-Install bigger =Idle+Main Jets.(Kientech.com)
-LT250S Cam.
That only, once installed, gives you 19hp; 130km/h with a 16t front sprocket.
If you add a DR200 33mm Carb youll hit 21/22hp.

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Originally Posted by chete44

==Beware : Djebel 250 is a Totally different engine to Djebel200!!.==
Yes, older Djebel200 models had the same Cam;(and Power=18hp) ,that DR200, However, newer Djebel models declare 20hp(2002); I cant say for sure , first hand, as I havent seen it in person,Is it True?; if Yes, ¿where gets 2hp more?!; my guess is that some of these new features is to be blamed:
1/New Oil cooler may help.(to stabilize-Not increase- power)
2/New bigger(in diameter) exhaust+header.
3/Carburetor : here is the MAIN difference : while our qingqi 200(or whatever make you had) has "only 28mm/16hp". Suzuki has allways mounted 31mm/33mm!. You can even fit a Keihin FCR35mm. That will ,probably,make a world of a difference at high RPM, but costs a fortune($700). This alone doesnt make much sense ; unless you remove first the standard CDI, for another "Unlimited"(see forchetto posts); to get its full potential.

There are cheaper ways to "release" the easy/Cheap HP out of your XP200.
-remove EGR valve (from 2007 on)
-Open -Dont remove-, 2x 25mm holes on top of your airbox.
-Install bigger =Idle+Main Jets.(Kientech.com)
-LT250S Cam.
That only, once installed, gives you 19hp; 130km/h with a 16t front sprocket.
If you add a DR200 33mm Carb youll hit 21/22hp.

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thanks that was usefull

YOu guys seem very knowledgeable (*spelling?). Can any of you tell me if it will hurt or help to put on the K&N clamp on? I purchased one from JP motorsports and its sitting at the house in SC until I return from FL. If there is no advantage I will send it back.

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Originally Posted by realone87

YOu guys seem very knowledgeable (*spelling?). Can any of you tell me if it will hurt or help to put on the K&N clamp on? I purchased one from JP motorsports and its sitting at the house in SC until I return from FL. If there is no advantage I will send it back.

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--I suppose ¿ are you thinking to Install a K&N air filter; while removing the airbox? or changing the standard foam for a high flow K&N inside the original airbox?
If so #1, then let me warn you : It doesnt Work removing the Airbox; IMO ,for whatever reason CV (constant Velocity) carburetors NEVER work properly without their own airbox; dont ask me why; Ive learnt that the hard way after some 100 attempts ; thats a Fact.
Thats why my advice is :, instead of removing it, open a pair 2" holes on top of it. and fit inside whatever air filter you like.

Two inches? When u say whatever filter do you mean stuff one in there or whatever replacement that fits.

Constant velocity is or can be equated to what is linear in straight flat line, it does not increase or fall as is it is constant. The air flow is constant. Then you can consider the Bernoulli principle and that an increase in velocity brings about a decrease in pressure.

If you remove the constant then it become a curve increasing the air flow can bring about a loss in pressure since the pressure regulates the float and fuel flow you can understand that adding more air is not desirable.

Also the engine does not have an EGR it has a SAI, the former send exhaust back into the intake side to displace oxygen, the later lets oxygen into the exhaust to ensure a more complete burn. The engine has a secondary air intake (SAI) removing it will not improve performance.

so am I right in thinking that if I was to put a cam from a lt230 or lt250 in my engine it would give the valves better lift and duration? What other options are there? all I could find is one auction for a lt230 cam from america which costs close to £100 :(

The used LT230 cam is about US$ 2? + postage or Tries the NEW for EN125 from China (That seller claimed design as webcamshafts.com 's product)

DR125se (Old design uses 12mm spark plug) is using bigger valve . The LT230 cam's result on small valve (NEW design 10mm spark plug) bike maybe ...

Do you have a link for the cheaper cam?

Also I found a cam for the gn250 which looks very simular to my stock cam, do you think that would have the same effect as the lt230 cam?

http://item.taobao.com/item.htm?id=3..._4z3_240497486

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Originally Posted by spencer2004

Do you have a link for the cheaper cam?

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The url is in ur previous thread. User's reoprt: http://www.motorfans.com.cn/bbs/t_17352513_1.htm

Sorry about posting in this thread again but I want to make sure that I order the right cam. I found this which says that it is for the en125, will this work in gs125 copy engines? Also in the 2nd item picture there is another cam along side it called the xlite gs02 which is apparently for the gs125 but I cannot find it anywhere! If someone could send me a link for that or a better alternative that would be great.

Ur bike is more like the EN (sparkplug / piston / CDI ...)
Why NOT chats with them? http://xlite.taobao.com/view_page-279236423.htm They list their official QQ number / University graduates at least can communicated in "dumb" (ie. written) English... | Finding someone from here help u to input the Q in chinese also isn't that hard:thumbsup:

Yeah I thought about that but I thought there would be some communication problems but if you say so I'll give it a go.

I did some research on the EN125 performance cam and decided that it would not work so I bought a qm200 cam. I compared the EN125 performance cam to a GS125 performance cam sold in the uk and the EN cam was stupidly over the top; it had a duration of 284 degrees which is like a stage 5 racing cam which would have virtually no idle and require new valve springs and all that crap. It should take about 3 weeks for the cam to arrive, hopefully I will get a big of extra performance out of it.

I would like to ask if its possible to install to Sinnis Apache 125 (basically Qlink 125 version) the same camshaft, for example Suzuki LT250,LT250E camshaft, or LT300 camshaft. possible? :)

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Originally Posted by SanoShaker

I would like to ask if its possible to install to Sinnis Apache 125 (basically Qlink 125 version) the same camshaft, for example Suzuki LT250,LT250E camshaft, or LT300 camshaft. possible? :)

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It looks like it should work. Keep in mind that this kind of mod has only been done by 1 or 2 people on this forum so the results aren't completely known, if you do this mod make sure that your valves aren't hitting the piston before you fire up your engine.

Quote:

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Originally Posted by spencer2004

I did some research on the EN125 performance cam and decided that it would not work so I bought a qm200 cam. I compared the EN125 performance cam to a GS125 performance cam sold in the uk and the EN cam was stupidly over the top; it had a duration of 284 degrees which is like a stage 5 racing cam which would have virtually no idle and require new valve springs and all that crap. It should take about 3 weeks for the cam to arrive, hopefully I will get a big of extra performance out of it.

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You are using that qm200 cam?

Sorry to bring this back up but does anyone know if the suzuki lt250 camshaft would work ok in my rmr125? I actually have one of these cams lying about and after reading this and having a look at the lt250 cam it looks the exact same as the one in my bike but I don't want to fit it if it doesn't work ! If it's no good can someone point me in the direction of one on taobao ?thanks

they said that LT230 works fine,, so i guess, LT250 has just bigger lift and duration.. (more power definitely).. and if you have 30mm molkt carb together with 150cc cylinder, this is definitive good upgrade,, this way i am sure, you will hit 10k RPM without problem as you did in stock, and after this, you may need to go up on front sprocket, because you will have ton of unused power because of short gears.. .. btw.. where did you buy 30mm molkt carb, how much did it cost you, intake malifold worked ok on that carb and.. can you reach 10k RPM now? :) (as on stock..)
and.. 150cc cylinder + these other upgrades.. how much did it improve power.. and whats your top speed? :)

Thanks for the reply I might fit the lt250 camshaft tomorrow then !I'm guessing the cam sprocket on my original camshaft will bolt straight on to it and hopefully get a little gain ! :) any ideas on the valve clearance settings when I change it? And will I need to fit bigger valves and springs or anything or is it just as easy as switching over camshafts?.I got my Molkt carb from eBay and used the manifold of the stock carb to get it to fit ,after all the mods I've done to my bike I can get 75-80mph from it on a good day it's a huge difference as when it was stock I would only get 60mph but I have fitted the big bore kit,performance cdi,performance coil,bigger carb and jets and full dep system and 17t front sprocket and a few other bits and bobs to get it to where it's at ..it's a great bike for what I need it for :)

Actually its recommended to change springs.. but unless you are gonna push it too far (over 10k RPM) i dont think there is gonna be problem,..
can you reach on stock cam 10k rpm with these mods?... Its gonna be more than little gain :P, i guess. keep clearances close to stock, before starting the engine with starter.. try turning engine with that bolt.. to see if valves doesnt hit piston, as you have beautiful bike.. and.. if it start and runs, i guess you will need to increase idle rpm a bit due to more wild camshaft timing :), and also lif it start and runs,, dont rev it like crazy,, rev gently, as it needs a bit of break in..
PS: What is your current engine miles? (not mileage, but how many miles did already the bike travel.. )
aaand. give us some pics, because i want to do this too,.
If it runs good, give us some video :)
Have fun tuning your RMR :)

Thanks for reply ,I'll just leave the springs as they are and just install the lt250 camshaft first and see how I get on,I don't really push the bike to much unless I do a bit of off roading on it in the nice weather ..I'll probably get round to installing this cam in a few days when the weather clears up a bit and don't see any problems fitting it tbh unless my stock camshaft sprocket doesn't fit on the suzuki lt250 camshaft which would mean I'd have to order another cam sprocket to fit.After I installed all the current mods on bike I've probably done around 700 + miles so everything's more or less ran in and the bike runs perfect .I can get to 10k revs on my bike at the moment and I'll certainly get a few pictures of the cam when it's installed and a video ..Here's hoping it goes well the only difference I did notice between the cams is the stock cam seems a little bit longer at the end where the sprocket goes where as the lt cam is slightly shorter but otherwise there identical and should fit ok :) the cam I'm fitting is a year 86 - 87