New guy to Buckets

**mossy1200** · 7th July 2012, 15:38

Thanks Hus.

Putting the 30mm on with a shortened intake manifold that my mates going to make and blend. 28mm might have been better but I can re-use the 30 if I get a fxr engine later.

Front guard fits well and clears the disc well.

**Drew** · 7th July 2012, 19:19

Four stroke runs rough, but only under load...Weak spark would be my first place to look.

Thanks for the carb offer, but I've got factory support on parts already

**mossy1200** · 7th July 2012, 19:25

Originally Posted by Drew

Four stroke runs rough, but only under load...Weak spark would be my first place to look.

Thanks for the carb offer, but I've got factory support on parts already

Just started after new muffler Drew. The old system had 2 mufflers(well one was a sort of skwished pipe inside another pipe). It seems to be lean. Ill fit up the new carb and try again. Sparks all good as its points and the plate hasnt moved. I marked it up when I first got it. Ran fine until the end of last meeting. first time running it away from garage with new pipe was the backfiring under load. Good bottom but falls apart at mid revs.

You know where the carby is if you need it.

**Drew** · 7th July 2012, 19:39

Originally Posted by mossy1200

Just started after new muffler Drew. The old system had 2 mufflers(well one was a sort of skwished pipe inside another pipe). It seems to be lean. Ill fit up the new carb and try again. Sparks all good as its points and the plate hasnt moved. I marked it up when I first got it. Ran fine until the end of last meeting. first time running it away from garage with new pipe was the backfiring under load. Good bottom but falls apart at mid revs.

You know where the carby is if you need it.

New muffler is bigger inside diameter then?

Cheers mate, talking to Bryce earlier and he thinks I might get away with running a single carb, which I already had on the DT, but if not I'll try and source two 17mm flat slides which fall just on the 24mm limit by working out the surface area.

**mossy1200** · 7th July 2012, 19:47

Originally Posted by Drew

New muffler is bigger inside diameter then?

Cheers mate, talking to Bryce earlier and he thinks I might get away with running a single carb, which I already had on the DT, but if not I'll try and source two 17mm flat slides which fall just on the 24mm limit by working out the surface area.

Yeah . I did those calcs also as i was looking at a complete bike. Y intersection and 24mm would be best as it 180deg crank so so suck big twice as often would be better.

Yes I cut the old first muffler and he had reduced down to about 10mm by 30mm with and tube inside the cone shaped like a expansion chamber. Also the welds were all poo inside with bit of mig still inside like a 10year olds snotty nose. I should go take photos because however bad you think it was your only half way there.
New muffler is straight through. Im looking for a better muffler with larger volume as I think the one I got is at the noise limits. Even if its ok idd rather be on the low side.
I may even miss the next meeting if I have tuning issues.
Do you think its worth a dyno tune Drew? ill def get a better muffler first if I chose to dyno tune the carby. Most likely this one.

http://www.trademe.co.nz/Browse/List...x?id=490352922

**Drew** · 7th July 2012, 19:56

Originally Posted by mossy1200

Yeah . I did those calcs also as i was looking at a complete bike. Y intersection and 24mm would be best as it 180deg crank so so suck big twice as often would be better.

Yes I cut the old first muffler and he had reduced down to about 10mm by 30mm with and tube inside the cone shaped like a expansion chamber. Also the welds were all poo inside with bit of mig still inside like a 10year olds snotty nose. I should go take photos because however bad you think it was your only half way there.
New muffler is straight through. Im looking for a better muffler with larger volume as I think the one I got is at the noise limits. Even if its ok idd rather be on the low side.
I may even miss the next meeting if I have tuning issues.
Do you think its worth a dyno tune Drew? ill def get a better muffler first if I chose to dyno tune the carby. Most likely this one.

http://www.trademe.co.nz/Browse/List...x?id=490352922

Depends what you're gonna do to the motor mate. Flowing the head, lightening the crank/rod, and enlarging the valves, might get you close to the poke of an FXR with a carb and pipe, after you spend some time on the dyno.

The build is the most fun part for me at the moment, (but it would have to be since I haven't even raced mine), so the dyno time will help teach you engine building pros and cons I guess.

**mossy1200** · 7th July 2012, 20:06

Originally Posted by Drew

Depends what you're gonna do to the motor mate. Flowing the head, lightening the crank/rod, and enlarging the valves, might get you close to the poke of an FXR with a carb and pipe, after you spend some time on the dyno.

The build is the most fun part for me at the moment, (but it would have to be since I haven't even raced mine), so the dyno time will help teach you engine building pros and cons I guess.

Head ,cam and valves done. Crank has stroke of xl125 so assume it is. someone has spent money but I think they removed a good carb seeing as manifold was 28mm but carb was 24mm.

Im just at a stage where any parts I buy need to be good enough to fit onto a FXR motor incase I get one later and hot it up before installing, hense the 30mm carb instead of 28mm.
I really dont expect this 2 valve motor will ever deliver much more than 15 unless its very well set up and then even 20 would be a mission to find.

**Drew** · 7th July 2012, 20:14

Originally Posted by mossy1200

Head ,cam and valves done. Crank has stroke of xl125 so assume it is. someone has spent money but I think they removed a good carb seeing as manifold was 28mm but carb was 24mm.

Im just at a stage where any parts I buy need to be good enough to fit onto a FXR motor incase I get one later and hot it up before installing, hense the 30mm carb instead of 28mm.
I really dont expect this 2 valve motor will ever deliver much more than 15 unless its very well set up and then even 20 would be a mission to find.

Only one guy I can think of would try and extract that from a small block Honda single mate, and I doubt very much that you'd wanna pay Mr Sales for the number of hours it'd take him. The XR600 that Chris runs must owe YEARS in development.

**speedpro** · 7th July 2012, 20:32

Originally Posted by Drew

Only one guy I can think of would try and extract that from a small block Honda single mate, and I doubt very much that you'd wanna pay Mr Sales for the number of hours it'd take him. The XR600 that Chris runs must owe YEARS in development.

YEARS?, make that decades.

**mossy1200** · 7th July 2012, 20:40

Originally Posted by speedpro

YEARS?, make that decades.

I only have 7 days lol but............. I might get near 20 on Welly Motorcycles dyno. Nope prob still only 15 or a honest 10 anywhere else perhaps. Its not funny when you need to push your bucket up the last half of the hill at Kaitoke.

**Ocean1** · 7th July 2012, 20:42

Originally Posted by Drew

Only one guy I can think of would try and extract that from a small block Honda single mate, and I doubt very much that you'd wanna pay Mr Sales for the number of hours it'd take him. The XR600 that Chris runs must owe YEARS in development.

That thing's like Murphy's axe. Last time he lunched it he was muttering about a longer "handle".

**Drew** · 7th July 2012, 21:08

Originally Posted by Ocean1

That thing's like Murphy's axe. Last time he lunched it he was muttering about a longer "handle".

Was there today picking up the donor, he should have the beast back together in the next week or so I think he said.

You know it's a serious motor, when to keep the gearbox remotely reliable, the oil is so thick it needs to be pre heated by laying a fan heater under the bike.

**Ocean1** · 7th July 2012, 21:15

Originally Posted by Drew

Was there today picking up the donor, he should have the beast back together in the next week or so I think he said.

You know it's a serious motor, when to keep the gearbox remotely reliable, the oil is so thick it needs to be pre heated by laying a fan heater under the bike.

That must be costing him some horspower.

3rd gear dogs the weak link there?

**gav** · 7th July 2012, 22:50

Originally Posted by Drew

Only one guy I can think of would try and extract that from a small block Honda single mate, and I doubt very much that you'd wanna pay Mr Sales for the number of hours it'd take him. The XR600 that Chris runs must owe YEARS in development.

This guy here has got reasonable power out of an old Honda single too, worth having a chat with.

http://www.marshland.co.nz/CB150Frame.html

He posts on here too. http://www.kiwibiker.co.nz/forums/me...23415-marsheng