TB88rh vs. ported/polished TB88rh

Hell yea get it ported and polished! I've had both; Mark does a nice work and it is definitely worth the tiny amount of coin he charges to do the job... for sure get it done.

reserectedmxr-

For sure.... i'm with ya.





I was hoping to hear some actual reviews between the 2 kits. I can't wait an want some info to hold me over!!!

It's not night & day, but it's a help in the upper ranges. Still wanna get the squish tight, jet it right, have the right combo of carb, manifold and pipe, etc.

firepower354 said:

It's not night & day, but it's a help in the upper ranges. Still wanna get the squish tight, jet it right, have the right combo of carb, manifold and pipe, etc.

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Well, from reading your posts/threads...... I value your opinion.



Honestly though, I have a standard bore BBR exhaust that is likely staying put. Will this be a problem with the ported 88 motor?



As far as the carb..... I'll dial it in as best as it will allow and in all probability will buck up for something of higher quality than the shengway. Any recs?

Pipe's fine. 20-22 round slide Mikuni or Keihin, I like. Sometimes a 24 flatslide, but most of my 88's are 106's

if the sheng wey is working I would just run it. If you want a better carb go with a "real" version. There are a ton of fakes that are crap, I tried to find a deal on a cheap one and ended up just buying from a dealer. I put an IRK with the ported/polished head with a well tuned carb on my 88 and it is way faster than when I just had the 88kit installed. The ported and polished head made it feel like I recieved about 1500 to 2000 more rpm out of my 88 than when I had the standard race head. *just my experience.

Reserectedmxr-

I'm all Takegawa but i used both std bore and big bore pipes on my R-Stage motor and the std pipe really held it back,try both if you can use a friends and see what you think.

I've ridden both. I have one that Mark ported and it really rips up top! It runs like a raped ape on top till it starts to taper off at 11.6k and will go into the 12s. Like Firepower states, tighten up the squish and I think you'll get more bottom than with an unported TB racehead and still have the killer top end. I also run a E22 head Mark (AHP) ported with a high compression set-up on a 107cc that I was really pleased with also. I only use these two for road racing though. Mark seems to be overly modest about his engine work and you get your money's worth.

firepower354 said:

It's not night & day, but it's a help in the upper ranges. Still wanna get the squish tight, jet it right, have the right combo of carb, manifold and pipe, etc.

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So what do you mean by "squish"?



Like I said.... I will have the std bore bbr pipe and the manifold that comes with the TB kit. Do you recommend another type? I'm seriously thinking of upgrading to a new quality carb but if I get the shengway dialed in and it runs gooooood...... I may just stick with it for now. I know what parts you like to build with and that you know what your doing..... so do you think my setup will be good to go? Thanks.

I think what they mean by squish is the thickness of the head gasket. Thinner gasket=tighter squish.

rc164racer said:

I think what they mean by squish is the thickness of the head gasket. Thinner gasket=tighter squish.

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So would the gasket that comes with the TBrh kit be fine or should I get a different one? Do I need thicker or thinner? Anyone know which would be better and what's the difference in performance? Compression? Displacement? I want to build this thing the best that I possibly can. Thanks for all the help, guys! I am soooo close to being finished with the bike(except for my stator/lighting kit.

I believe what Firepower is saying is that you can tighten it up which in turn would help with power a bit, displacement would remain the same, this is just a head/gasket mod. Fire knows what he is talking about (he's been around for awhile haha) but in my opinion for 99% of people, I would recommend just using the included gaskets just for reliability sake alone.



As for carb the sheng wey is decent but I always liked the 24mm keihin round slide and have run it on anything from 88's to 117's.

Where can you get thinner head gaskets?