My granddaughter has a 2004 TXT pro 125 which is flat as fart is there a solution ie jetting or Boyesen reeds to enable her to get more bottom end power, we have had the bike about 6 months and she has just started so its ideal to learn on! but would be nice to have a bit more instant power to get the front wheel up, I realise it might be a bit tired after 4 years.

My granddaughter has a 2004 TXT pro 125 which is flat as fart is there a solution ie jetting or Boyesen reeds to enable her to get more bottom end power, we have had the bike about 6 months and she has just started so its ideal to learn on! but would be nice to have a bit more instant power to get the front wheel up, I realise it might be a bit tired after 4 years.

Hi

A 125 should be more than enough without having to pep it up. Even my sons 2002 125 pro was carrying my 90 kg quite well..

If it really is "flat as a fart" I would think that there is something wrong. I suppose You have cleaned the air filter and carburator? Checked the existing reeds? Changed the plug? Cleaned the filter in the fuel tap? Every connection between air filter, carb, reedhouse, cylinder is tight? Is the exhaust not clogged?

If this doesnt help there can be other issues like the cylinder, piston or rings (or all).

Hmm... faulty crank seals?

Missing something now??

-Jan

You may consider fitting a 200 cc (actually a 175cc) cylinder, the 125 doesn't develop a lot of torque so you need to use revs to get into the power.

Spencer

A 125 should be more than enough without having to pep it up. Even my sons 2002 125 pro was carrying my 90 kg quite well..

If it really is "flat as a fart" I would think that there is something wrong. I suppose You have cleaned the air filter and carburator? Checked the existing reeds? Changed the plug? Cleaned the filter in the fuel tap? Every connection between air filter, carb, reedhouse, cylinder is tight? Is the exhaust not clogged?

If this doesnt help there can be other issues like the cylinder, piston or rings (or all).

Hmm... faulty crank seals?

Missing something now??

-Jan

I would tend to agree with Jan, I think there's something that's causing the lack of power. I built a GG 125 for one of the U.S. riders at the 05' U.S. World Round and it was not much off stock to work well. Danny Oliveras showed me the few parts that he brought with him from Spain to install on a stock bike and they were not anything unusual and he was world 125 Trials champion.

I would start by doing a complete engine evaluation and adjustment to eliminate causal factors. What jetting are you using?

Jon

I would start by doing a complete engine evaluation and adjustment to eliminate causal factors. What jetting are you using?

Jon

I tried my carb of my 05 TXT pro 250 it didn't make much difference! Would a simple compression test do, to see if the engine needs attention?

Cheers Mike

You may consider fitting a 200 cc (actually a 175cc) cylinder, the 125 doesn't develop a lot of torque so you need to use revs to get into the power.

Spencer

That is a wery elegant way of "pepping" a 125. It is a direct swap. Just need a cylinder and piston.

In this case I still mean that it should not be nessesary, but for an old (heavy) guy like me the 200 (175)cc is a perfect toy. More than once have I wondered why I changed my old 200 to the beast of a 300 I have now

-Jan

You may consider fitting a 200 cc (actually a 175cc) cylinder, the 125 doesn't develop a lot of torque so you need to use revs to get into the power.

Spencer

It's an idea, but don't let it make you think the 125 won't have the power if it's running right.

The 125 is hellish powerful when you wind it up. I actually think I ride slightly better on one except on stuff I need some torque to get me out of trouble, and I'm about 125Kg.

You're a bit far away for me to suggest someone to have a look at it.

It's an idea, but don't let it make you think the 125 won't have the power if it's running right.

The 125 is hellish powerful when you wind it up. I actually think I ride slightly better on one except on stuff I need some torque to get me out of trouble, and I'm about 125Kg.

You're a bit far away for me to suggest someone to have a look at it.

I agree,my son has an 03 which is in top condition,its fairly flat on low revs but when you give it a hand full its mean!

Edited September 25, 200817 yr by dabomb

Renew the mid box and rear pipe with an 03, 05 or later the 04 exhaust on the 125,200s are no crap then see how it runs

Edited September 25, 200817 yr by no1

The engines on the 125cc Gassers are not subtle, that is why I suggested the upgrade to the larger bore. As others have noted, the response at higher rpm is fierce on the 125. You may also consider checking out the thread on this forum on upgrades to 225cc kit. We put the kit on a 2007 125 racing for my spouse-like partner girlfriend and it is a beautiful machine.

Spencer

The engines on the 125cc Gassers are not subtle, that is why I suggested the upgrade to the larger bore. As others have noted, the response at higher rpm is fierce on the 125. You may also consider checking out the thread on this forum on upgrades to 225cc kit. We put the kit on a 2007 125 racing for my spouse-like partner girlfriend and it is a beautiful machine.

Spencer

Spencer, is that the S-3 kit http://www.trialspartsusa.com/racing-parts.html ? That sounds like my kind of hybrid.

Jon

Hi Mike,

Would be good to have a look at it the next time we are at the same venue, you never mentioned that it wasn't going well at the last trial. On the 125 motor, there should be plastic crankcase padding installed under the cylinder, in the mouth of the crankcase. Have a look under the barrel, you can leave the head on, it is a white plastic moulded piece.

Bye, PeterB.

Jon, that is the kit. We got the first one to hit North America and managed to con it out of Adrian. Lots of fun.

Spencer

Jon, that is the kit. We got the first one to hit North America and managed to con it out of Adrian. Lots of fun.

Spencer

Neat! I know S3 makes a lot of aftermarket parts, but I understand they are the company, under contract, that makes all the stock GasGas cylinders for all the Trials bikes.

Jon

Thanks or your replies guys we tried a (new) 07 125cc at the weekend, obviously it more responsive but it had the same basic characteristics as our 125 flat at low revs but flies when revved, so decided if it aint broke don't fix it!