drz470 power

[chappy1974]

hi not been on for a long time but still love the drz just had it dynoed only 43 bhp should it be more with the mods i have

470 kit

yoshi cams

full yoshi exhaust

3x3 air box mod

fcr39 carb

dyno guys said they had to lower the jettting down to a 135 from a 160 as to rich does this sound right

still had no luck getting the yoshi cdi (mitsubishi) to work starts but doesnt rev

cheers chris

[f2dog]

hi not been on for a long time but still love the drz just had it dynoed only 43 bhp should it be more with the mods i have

470 kit

yoshi cams

full yoshi exhaust

3x3 air box mod

fcr39 carb

dyno guys said they had to lower the jettting down to a 135 from a 160 as to rich does this sound right

still had no luck getting the yoshi cdi (mitsubishi) to work starts but doesnt rev

cheers chris

135mj ???????

[Wayward Son]

470 as in all bore? if so doesnt suprise me. the yosh cams are killing you as well.

which yosh pipe?

what rear tire?

what dyno brand?

yep the current yosh cdi boxes are pro-com junk.

[fastbikesrule]

Do you have a base run before the mods? The gain in HP is more important than the max HP, if that makes sense.

My bike with a 470, ported head, +1mm intakes, RHC cams, FCR 39 and full stainless yosh made mid-40's on a factory pro dyno.

[Wayward Son]

that is correct.it all about the actual gain.

[urymoto]

im not sure i get what you guys are saying?

i mean, our bikes start more or less on the same baseline...32-35hp..

so 43 is still a not big enough gain over base, right?

i mean mine is around 40hp dyno before cams (stock bore)...

hes got a 470...he should be way over...

[fastbikesrule]

Only if you had 40hp on the same dyno.

[fastbikesrule]

My bike was 31hp completely stock. It's about 50hp now with an FCR39 and Ti Yosh. On the same dyno, my SXV-550 makes 57hp and my CBR954RR made 133hp.

On a DynoJet, the SXV's make close to 70hp and the CBR about 150.

[Wayward Son]

not all dynos read the same even the same brand.

you must do a baseline run for the dyno number to mean anything.

other wise its just a pretty picture.

you must have before and after dyno graphs from the same dyno.

[f2dog]

Here ,on the North Pole, we have kind dynos and strickt dynos.

Some are known for high numbers others for less.

As stated, for getting a real view on the gain, you need a "before" and an "after" on the same dyno, with similar correction factors.

I have dynoed the same bike with 2 days between (Gixxer k7) and there was 23 hp's at top difference between the 2 dynos(Not even at the same rpms). One measured with din and sae- factor ,the other sae. Since i got the second dyno for free ,and was only looking for better af,I didn't mension the stupid high numbers,but went home and altered my mapping:thumbsup:

[iowaBClivewire]

im not sure i get what you guys are saying?

i mean, our bikes start more or less on the same baseline...32-35hp..

so 43 is still a not big enough gain over base, right?

i mean mine is around 40hp dyno before cams (stock bore)...

hes got a 470...he should be way over...

they are saying that every dyno is diferent

so to see the gains you need to dyno the stock bike than dyno after all the modds

[mickeydee]

they are saying that every dyno is diferent

so to see the gains you need to dyno the stock bike than dyno after all the modds

and also using the same dyno for each run.

[chappy1974]

yea i never had it dyno'd before it was at 37 with mods then 43 when jetting sorted the yoshi cdi is the mitsubishi type had it in the garage 4 a while now so not a procom one !

[Raptorz]

That is what Eddie did when I first brought my bike to him.

Wheeled it straight onto the dyno and did a few runs for data collection.

After working his 470 magic on engine.. he dynoed the bike again it showed an almost 20 hp gain when the data was compared with the first run.

I thought of doing another dyno run here in Singapore to see if the humidity and tropical sun, white sandy beaches, swaying cocounut trees would have changed the max hp produced by the engine..... but after reading all this.. I think I go Sentosa beach and watch the bikini babes play beach volleyball and sip my cold beer under shade of the angsana trees better.

I could get a reading of 140 HP on the local machine and it all don't mean nutz.

[chappy1974]

thanks raptorz, im not at all envious its a lovely its only 0-1 degrees

[anthonyzx10r]

hi not been on for a long time but still love the drz just had it dynoed only 43 bhp should it be more with the mods i have

470 kit

yoshi cams

full yoshi exhaust

3x3 air box mod

fcr39 carb

dyno guys said they had to lower the jettting down to a 135 from a 160 as to rich does this sound right

still had no luck getting the yoshi cdi (mitsubishi) to work starts but doesnt rev

cheers chris

i have a 470cc and you need to put a fcr41 carb on

[ebrabaek]

i have a 470cc and you need to put a fcr41 carb on

He is actually right in the middle of the teeter totter. When you port the head...oversize valve it......and rhc cams....for sure 41 is the way to go...But I think a 39 will be ok here. Ditch the Yosh cdi. They are junk. Put back the stock to start with..... Thats what I have on my SSW 470...Works fine.? :smirk:

Erling

[iowaBClivewire]

yeah ebrabaek

didn't you have a 8 HP diference between the Yosh rs3 and the Ti Yosh wile Eddie was dynoing your new 470cc ??

[ebrabaek]

yeah ebrabaek

didn't you have a 8 HP diference between the Yosh rs3 and the Ti Yosh wile Eddie was dynoing your new 470cc ??

Yeppers.......The rs-2 header restricted the flow to 45hp......the TI yeild`ed 53....by the flick of a switch. Eddie was stumped......I had to be defribilated....?

Erling

[IRON MAIDEN]

So, you got rid of your Ti Yosh and swapped out to the MRD/SSW?

Any reason why? I know they are both the best and if I remember the dyno's on the prototype MRD, wasn't the Yosh still slightly better?