Planning an Epic Adventure - Will trade beer for use of couches

**motorbyclist** · 3rd August 2009, 16:52

here, have some pics.

Methinks this might be a good excuse to go find a 125cc topend

**motorbyclist** · 3rd August 2009, 17:24

reckon it's worth replacing the little end roller bearing? it seems fine to me...

**Danae** · 3rd August 2009, 17:29

Two words: MOAR POWAR!!!

Yeah I left my wallet in your shed.

**motorbyclist** · 3rd August 2009, 18:07

Originally Posted by Squiggles

I already hadz sources bookmarked.
http://shop.wemoto.com/index.dyn?oid=5834428

ooooh!

http://shop.wemoto.com/pictures.dyn?u=5834428qqq5828730

if i'm not careful this could become very expensive...

**nsrpaul** · 3rd August 2009, 18:27

Originally Posted by motorbyclist

reckon it's worth replacing the little end roller bearing? it seems fine to me...

short answer, yes

**nsrpaul** · 3rd August 2009, 18:29

Originally Posted by motorbyclist

here, have some pics.

Methinks this might be a good excuse to go find a 125cc topend

looks nasty, bad fuel??

**motorbyclist** · 3rd August 2009, 19:21

Originally Posted by nsrpaul

looks nasty, bad fuel??

doubt it, BUT i did just give her a clean last night so might've gotten a bit of water in there. How would bad fuel cause this? looks like a spark plug melted hole rather than detonation, though the hole is somewhat off centre

I think it was really just a result of 5 minutes topped out open throttle, BUT, surely it would've happened before now if that was the case.

oh, and is that the standard carby etc? i might look at getting those fibre reeds if it's worthwhile, but then i may as well get a bigger carby and filter too

**nsrpaul** · 3rd August 2009, 20:10

carby etc all std, looks like detonation

holding it wide open is where it would happen but like you say wouldve happened before

asked about fuel as it is a variable that might have changed, air leak somewhere maybe?

running 91 or 96?

the big power gains on an mb's induction are from going to a bigger` reed valve as they are only 2 petal std!!

expect gas consumption to go up heaps when you go for bigger varbs etc tho

best option for more power is a mild port, sort the transfer and exhaust port durations, might not be so good for touring then tho

**nsrpaul** · 3rd August 2009, 20:11

note that a bigger`reed valve really needs work to the cases, either to get it ti fit or work proper

**nsrpaul** · 3rd August 2009, 20:22

http://ericgorr.com/piston%20problem...leshooting.pdf

**MarkH** · 3rd August 2009, 20:40

Originally Posted by motorbyclist

here, have some pics

No biggie - that'll buff right out!

**motorbyclist** · 3rd August 2009, 20:44

Originally Posted by nsrpaul

note that a bigger`reed valve really needs work to the cases, either to get it ti fit or work proper

they're the same pattern, just not as strong so they open easier (or atleast that's what they say it does)

porting is beginning to sound expensive..... might just leave her standard (except for the RACE PIPE :2tumbsup

edit: running 98

Originally Posted by gijoe1313

:slap: Ahh this thread just keeps giving and giving!

hey, you! How is one meant to remove the air box from a 250 hornet? it seems the bike is built around it. I've gotten it out but it entailed the use of a hammer (ok, not quite, but i did need a screwdriver to lever the thing), some swearing, and a lot of wiggling, due to the helmet lock blocking it's clean exit. Next is to pull the carbs off and clean them; they seem to be well stuck on like all good 4 cyl 4 carb blocks.

and all this to get the number three bowl to cease flooding after my little brother dropped it

(deal being i fix this tonight, have money for re-bore tomorrow)

**gijoe1313** · 3rd August 2009, 20:51

Crikey! I've never had to remove an airbox from a lil'ol'hornet before ... just opened up a file and looking at it ...and from the looks of it, it seems they have to install that in before they do some other components. So if what you did work, then alls well!

Hope you are progressing well on the spannering!

And ooh yeah, those photos look so familiar to what happened to Pippi on her excursion to the far north

**motorbyclist** · 3rd August 2009, 21:11

reeds:

Made by Tony Ducas of DC Engineering in the United States, the Hy-tech racing reeds are a well established favourite in the two stroke engine market and come in two varieties.

The standard fibre reed, orange in colour, or the new longer lasting black coloured carbon fibre CF series racing reed for longer life.

The purpose of a fibre reed valve as compared to the original equipment steel reed valve is principally to avoid engine destruction on a reed failure but the new Hy-tech racing reeds actually improve horse power andthrottle response on most engines throughout their lifetime. Upon eventual failure, Hy-tech racing reeds cause zero engine damage due to the low mechanical strength of the reed fibre.

Simply replace the steel reed petals one for one with the Hy-tech reeds and re-assemble reed block. No other modifications are necessary except on bikes where pilot mixture may need richening to improve easy starting

for 20 bucks i dunno if i'll bother....