DT125R ARCHIVE

craigbulmer · Guru

RE: My New Toy

DeeTee · DTR Senior Member

craigbulmer wrote:

looking good

reeds might any difference? or done all together?

whats with the restricted powervalve positioning :S?

Sorry Craig I dunno about the individual improvement, as the carb is so awkward to get off I did the reeds, main jet, inlet manifold and silencer all together, seems to be revving ok now but still running in, just past 500 miles now.

i dont understand your question re the power valve, I found it in the restricted position when i looked at it. as shown by the red outline on my photo.

-- Edited by DeeTee on Friday 19th of March 2010 09:08:05 PM

craigbulmer · Guru

i meant what you mean by restricted powervalve lol i thought powervalve was derestricted when reed switch was removed and was properly aligned:S ?

DeeTee · DTR Senior Member

craigbulmer wrote:

i meant what you mean by restricted powervalve lol i thought powervalve was derestricted when reed switch was removed and was properly aligned:S ?

ok then , it was mis-aligned and now it isnt, the reed switch has no affect over it anyway, thats just a speed limiter so only comes into play when doing a certain speed.

element · DTR Senior Member

yeh 60mph..

reeds make no difference either. dont waste your money.. My mate had exactly same bike as me, same year, same mods, same pipe and he had carbon reed and I had stock. No difference... and if there is its so small that its un-noticeable.. all they do is give a millisecond better throttle response... Only advantage of carbon reeds is they might last longer?

-- Edited by element on Monday 22nd of March 2010 01:21:19 PM

DeeTee · DTR Senior Member

I fitted the 3MB head the other week.

Tarted it up as would be appropriate.

Heres the difference
3BN with its groovy squish

And more traditional 3MB

I pressure tested both the heads and as expected the 3MB gave the higher pressure
3BN

3MB

New head new plug lets party biggrin

She's running quite well now

For the hell of it I think i'll pin my PV open

Just to see!!!

-- Edited by DeeTee on Sunday 23rd of May 2010 09:25:44 PM

craigbulmer · Guru

Sounds good.. fun but drinks fuel..

fray · Guru

Nice one DeeTee!! An extra 10PSI compression cant be bad!! The 3BN head must be holding back compression some how.

Have you noticed a difference in speed or running since you swapped the heads over?

I had a split in the rubber outer gasket that joins the exhausts and i noticed a big difference in performance when i repaired it so i must have been losing compression thru there!