Rejetting for reeds and head temp

[quocle603]

It might help with your mid range transition with those chambers, but i hear the DGs did not do much without modification. Do you currently have an issue with that right now??

what does the modification involve?

I had the pdf but somehow I lost the data somewhere... https://www.2strokeworld.net/forum/index.php?topic=726.0

[85RZwade]

Wicked is selling pipes for the RDs; Roger just posted about it on FB

[Scuffed98]

I heard that JL stopped shipping pipes into the US. I would really like to try a pair of Spec ii pipes. Since I heard they work really well with stock porting. However, I don't know who to get in touch with to try to buy a pair. I remember seeing a website a few months ago but now it's gone.

I would probably just keep the stock intakes instead of the banshee ones with crossover. Do what you will but your bike is pretty much stock with dg and 30mm carbs. How are the 30mm carbs? I assume they are VM


What are you looking to achieve? If you want high rpm hitting pipes, then try to find lomas and spec II. I have an extra set of spec II that I was able to pick up for under 300 bucks locally.

Whats the powerband rev range on JL's and spec ii's? As cool as would be to have my bike be a 10,000+ screamer I know for a fact that with the stock rotor and points my crank or ignition won't like that. I'm going to upgrade to a dyna ignition whenever I get around to doing the top end. My main goals for the bike is pretty much keep it decently streetable but also to have enough power on tap on the freeway to hit the 120mph max on my speedo.

[sav0r (CL MotoTech)]

Be careful with using head temps. They aren't that useful, I have seen Yamaha's run 580F CHT and be fine. It's a target temp based on ambient, and in a flat out run you will always be hotter than putting around.

For racing we always do ambient temp less baseline temp. So if it's 90F out and baseline is 60F, you take the 30F difference and add it to your target Temp. Which makes your 450F a 480F CHT temp.

CHT is a lot more useful in constant state engines like on airplanes. EGT on a motorcycle works great. I have had it on my 350 for a decade.

As for JL's. I spoke with Jim about two months ago. No mention of tariff/shipping stuff at the time, but he did say he builds all his street pipes for the street. As in, they are definitely brought into check somewhat. He didn't want to go into specifics...

The DG mod is a great mod, but its a fair amount of messing around. You can make the pipes significantly lighter too. It was worthwhile on my build.

[m in sc]

my jl pipes (for the t500) are on the way, just got the ups notification last night. so, they are shipping. On my rds, I have both spec-iis and Lomas on 2 different bikes, anything over 92-9500 is pure over-rev as that's about where they sign off. both are ported and will spin PAST 10, but the pipes sign off a bit earlier. my rev limiter is set to 10.2 in case of overrev (by a heathy margin). 11k is sort of the death zone and there's no reason to spin a 350 near that high

[RDnuTZ]

It might help with your mid range transition with those chambers, but i hear the DGs did not do much without modification. Do you currently have an issue with that right now??

what does the modification involve?

I had the pdf but somehow I lost the data somewhere... https://www.2strokeworld.net/forum/index.php?topic=726.0

thanks 

[Scuffed98]

my jl pipes (for the t500) are on the way, just got the ups notification last night. so, they are shipping. On my rds, I have both spec-iis and Lomas on 2 different bikes, anything over 92-9500 is pure over-rev as that's about where they sign off. both are ported and will spin PAST 10, but the pipes sign off a bit earlier. my rev limiter is set to 10.2 in case of overrev (by a heathy margin). 11k is sort of the death zone and there's no reason to spin a 350 near that high

On your RD's with the spec II's and Loma's  did you have to do a lot of porting on the cylinders?

[m in sc]

both were ported pretty extensively but for power.  i have another one with FPPs, also considered peaky pipes, with dead stock porting & zero headwork. THIS is the bike where the ignition really shines. theres a fairly recent video i took on it showing its useability in the low to mid range in the 'haus of projects' on my 72 r5. yes, its a full rd motor in there. even running stock carbs.

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https://www.2strokeworld.net/forum/index.php?topic=2693.60