I told you my jetting anywhere from a 105 to 120 main and a 35 to 40 pilot. I run PE24s.. Here is where I got my intake kit maybe they will sell just the boot.. Kitaco kit # P258-K or Takegawa P258-T CHP Motorsports Classic Honda Z50,XR50, CRF50, CT70, XR70, CRF70 AND XR100 motorcycles and performance parts Takegawa and Kitaco bore kits carb kits racing parts and performance mufflers..... But I dont think these boots will fit a Trail Bikes intake. Not sure on that as I run the takegawa and Kitaco intake on the Trail Bikes head..

 

I told you my jetting anywhere from a 105 to 120 main and a 35 to 40 pilot. I run PE24s.. Here is where I got my intake kit maybe they will sell just the boot.. Kitaco kit # P258-K or Takegawa P258-T CHP Motorsports Classic Honda Z50,XR50, CRF50, CT70, XR70, CRF70 AND XR100 motorcycles and performance parts Takegawa and Kitaco bore kits carb kits racing parts and performance mufflers..... But I dont think these boots will fit a Trail Bikes intake. Not sure on that as I run the takegawa and Kitaco intake on the Trail Bikes head..

Thank you taz, I know you had mentioned those settings before an I have them written down .. But I wanted to see more people with the same settings so I can narrow it down to just a couple jets. And as far as the boot goes I had seen those and I have a tb intake so I don't know if it would work. Hoping more people will chime in on this one. I know a lot of people run the tb stuff so just waiting for more responses. Thank you once again bro, good info.

 

24mm carb on an 88? Isn't it a bit much?

 

Honestly no. Your carb should be about the same size as your intake valve. If he has a tb race head it has a 25mm intake valve in turn he should have a 24mm carb. I only run a 20 on mine with the race head but I need all low end since mine is a stunt bike.

 

Cool the jet sizes are in 5s.. As in 105,110,115,120 And pilots are 35,38,40.. Dccycles what jets do you run in your 20mm carb? What kind of carb is it he was haveing a big problem getting a 20mm carb to run on a TB race head as an 88....

 

I'm running a 38 pilot and a 90 main I believe. I could be wrong on the main but I know for sure the pilot is a 38.

 

I've heard of and agree with the intake valve / carburetor diameter matchup - this tends to leave you with a close to ideal match up for full throttle operation, not at all what one would want for everyday riding (PE24 came stock on a Honda CR60, 13Hp 2 stroke vs. 7 Hp 4 stroke). However if that's taken into consideration, more power to you (literally).

 

Thank you all for the great info. Does anyone know about the 24mm rubber intake round adapter?? Will the tb 26-28mm adapter work on 24mm?? I wanna know if they run a little small??

 

I thought you could use just the manifold made for 24mm carbs. Maybe I'm wrong but didn't think you had to have the boot adapter.

 

Flat manifold, round intake carb.

 

I gotcha. You try minimobracing.com yet? They have a lot of stuff. Also talk to tboltusa on here. I do a good bit of business with them.

 

No the 26-28mm rubber adapter will not work on a PE24.. This is where running a Kitaco or Takegawa intake comes into play. The TB 24mm intake is made for a 24mm carb with a flat side that bolts to the intake like the stock carb or a 20mm carb.. PE24 has a round intake spout like a VM26 or PE28 but smaller.. 26mm carb works in a 28 boot and the other way around but the 24mm carb uses a different boot all together. I would send Mike at TB an email and ask what 24mm boot will bolt to his 24mm intake or you are just going to have to use a Kitaco or Takegawa intake..

 

Good call taz. I was pretty sure tb's 24 was a bolt on style carb while the tak/kitaco are ones that use the boot.

 

So I bought the carb not really realizing what I was getting myself I to. A 24mm carb is huge as in size! For a stock frame. I don't really want to run tank spacers or go spend tons of money to try n get this thing to work. So back to the bog with the pos sheng way. Anybody know of a straight bolt on maybe 22mm Japanese carb?? Something I can plug n play???

 

XR100 carb is a 22mm. Same bolt spacing as the Keihin 20mm, which the Sheng Wey is a copy of. It is taller and longer. Never had problems using a Sheng Wey 20mm on XR75/80s, but those were stock.

 

Yea anything bigger than a 22mm or 20mm you have to run some tank spacers...

 

Yeah I found that out yesterday when I mocked up that 24mm. It's pretty big, n I measured the intake to manifold port n it measured 28mm. It's a Japanese vm24-505 carb but the port measures 28mm. It's to big for my set up. I'll probably be posting it for sale pretty soon.

 

Hey taz you know of any 22mm that will bolt on to the tb manifold n work with out any tank spacers?? I know vintage mentioned xr100 carb.. Any other models?

 

I dont I have never used a 22mm carb before...

 

I'm running a true keihin pc20 on my 88rh & it bogs just like the shengwey. I don't know what the answer is but it's not that. I think maybe mikuni? I've jetted up, down, left, & right & it still will fall flat on it's face if you snap the throttle. I imagine a keihin 22mm will be the same story. I've heard the 20mm responds better to the stroker crank but can't tell you from experince.

 

My sheng wey doesn't bog. I got mine set up pretty good. I snap the throttle and the bike stands up. It took me a bit to get it tuned right.

 

I think the carb has something to do with the bog, could be wrong but simply take a Japanese carb and look down it from one side to the other. Is one straight diameter all the way across for the most part. Look at the Shen way...first off its not round(idk if it matters but when I see all the Japanese carbs are nice n round it makes me question this design) and second look at the left and right wall of the inside of the carb. It has some weird notches..

 

Well you're one of the lucky ones. I'm about 500ft 04 crf70(88rh/manual clutch) & fmf powercore. Running 90 main, 38 pilot, needle in the middle, air screw according. If I snap the trottle my bike will cut off. If I roll on it does ok. I've got the jets & have been up & down. The norm is you can make it better but never get rid of it.

 

I can snap the throttle on my bike with out dying/ cutting out. My problem is when I'm riding and I shift to second gear it's slow of the gear as it goes thru the rpms, it goes really good on the top end but my low end seems to not have the torque or power it should until it gets past 1/4throttle. I run 38 pilot, 92 main, needle clip one lean from center and a/f screw 1 turn out. Elevation is about sea level.

 

Yeah mine pulls good from mid to top but the bog takes alot of the fun out of it.

 

The bog is caused by the lack of accelerator pump (throttle valve opens quick, not enough vacuum to pull necessary fuel to prevent bog, engine falls on it's face). An accelerator pump would 'squirt' a bit of fuel into the mix when the throttles wacked open, temporarily rich mixture and no bog.

Seems to me a Mikuni VM22-133 would be about the biggest I would run on an 88. Reduced radius means an improvement on bog (more vacuum means more pull on fuel from main jet) and yet still large enough to feed that intake valve at WOT once it has it's legs under it. Flange style bolt on (49mm between centers) should work mint with most 22 mm intakes. Another thought is to run a longer intake manifold, which will help with low end power / bog.

 

What bike is that vm22-133 from?? And is that a bolt on to the tb intake?

 

Have you tried a 40 pilot. That would help with bottom end being richer...

 

The kit comes with a 38 as the biggest

 

Hence the reason a 108 runs better with the 20mm then an 88 does. More vaccum.

 

Those stroker kits come with bigger carbs, don't they?? I know the takegawa comes with a 24mm carb..

 

If you get one the basic kit is just the crank & gaskets. Alot of people run bigger carbs but it seems alot run the 20mm with good results too. I'm sure they give a little top end up but for no bog, i'd take it!

 

I see what your saying.

 

Yea if you havent tried a 40 and a 42 pilot I wouldnt say it dosent work. The pilot jet controls the area you are haveing problems. Less vacume would need a bigger pilot.. Just because it comes with dosent mean thats what it needs.. Lean bogging on the bottom end either lower the clip which will raise the needle.. OR a larger pilot till it stumbles on the bottom being to rich. I would at least try a 40 and 42 before giveing up on the carb..

 

Jets R Us, same as Keihin pilot jet.

 

similar question i am running a 22 mm carb on a race head and an 88 kit but get a long bog after half throtle does someone have a jet setting recomendation?

 

What are you current jets??

 

Cernicky you probably need a smaller main

 

similar question i am running a 22 mm carb on a race head and an 88 kit but get a long bog after half throtle does someone have a jet setting recomendation?

Your carb is missing the clip thing that holds the float bowl needle to the floats; get that first before you go changing your jets. I thought we already had this discussion on Saturday...

 

Yeah you're gonna need that cernicky

 

where can i get one?

 

You've taken too many bumps to the head, haha. Try and see of Nchm can order it for you or cheapcycleparts.com. I think its the same as a xr100 carb